Praise be to Allaah and blessings and peace be upon the
 Messenger of Allaah. 
What we have heard about what our Muslim brothers are
 going through in kaafir countries in the north and the south, where
 they are being harassed and persecuted for something in which they did
 not take part and in which they played no role, is not strange, given
 the wrongdoing and hatred of the kuffaar, even though they claim to
 be the people of justice, fairness and freedom. What is the crime of
 a Muslim woman who walks down the street in her hijaab? What is the
 crime of a Muslim who leaves his home to go and pray, not to spread
 mischief in the land? What is the crime of a Muslim employee who goes
 to his company or a student who goes to his university or a schoolgirl
 who is walking to her school, not going out to bomb and destroy? If
 the western man in the street was fair-minded – at least with himself
 – he would go and take revenge on the people who plotted and took part
 in harming him. But one who does not fear God could do anything, and
 the very least that the Muslims will be faced with is curses and insults.
 Allaah says (interpretation of the meaning): 
“and you shall certainly hear much that will grieve
 you from those who received the Scripture before you (Jews and Christians)
 and from those who ascribe partners to Allaah; but if you persevere
 patiently, and become Al-Muttaqoon (the pious) then verily, that
 will be a determining factor in all affairs”[Aal ‘Imraan 3:186] 
Our attitude must be clear; we must explain to the kuffaar
 the ruling of Islamic sharee’ah concerning harming and killing others.
 We should tell them that Islam forbids harming innocent people in any
 way, whether that involves harming their bodies, their wealth or their
 honour. The Prophet
(peace and blessings of Allaah be upon him) said: “There should be neither
 harming nor reciprocating harm.” It is not permissible to kill a kaafir
 who is not hostile or who has a legitimate peace treaty with the Muslims;
 rather treating a non-hostile kaafir with kindness is part of the Islamic
 religion, especially if that is done to call him to Islam and soften
 his heart (towards Islam). Allaah says (interpretation of the meaning): 
“Allaah does not forbid you to deal justly and kindly
 with those who fought not against you on account of religion nor drove
 you out of your homes. Verily, Allaah loves those who deal with equity”[al-Mumtahinah
 60:8] 
At times of war against the kuffaar, it is not permissible
 for a Muslim to deliberately kill a kaafir child or woman who is not
 bearing arms against the Muslims or helping in the fight. It was narrated
 that the Prophet
(peace and blessings of Allaah be upon him) said to the Muslim army:
 “Go out in the name of Allaah and by the help of Allaah, following the
 way of the Messenger of Allaah. Do not kill any old man, infant, child
 or woman… spread goodness and do good, for Allaah loves those who do
 good.” (Narrated by Abu Dawood, 2614; its isnaad includes Khaalid ibn
 al-Faraz, of whom Ibn Hajar said in al-Taqreeb, he is maqbool
 (acceptable) i.e., if there are corroborating reports) 
This is supported by the advice which Abu Bakr al-Siddeeq
 (may Allaah be pleased with him) gave to the commander of his army:
 “I advise you of ten things: do not kill a woman, or a child, or any
 old person, or cut down any fruit trees…” (al-Muwatta’, 982,
 Kitaab al-Jihaad). 
The kaafirs whom the Muslims fight and inflict harm and
 loss upon are the kaafirs who fight the Muslims and drive them out of
 their homes, or help to drive them out of their homes and punish and
 mistreat them, and who stand in the way of calling people to Islam and
 prevent people from following the path of Allaah, and prevent the spread
 of Islam. Allaah says (interpretation of the meaning): 
“It is only as regards those who fought against you
 on account of religion, and have driven you out of your homes, and helped
 to drive you out, that Allaah forbids you to befriend them. And whosoever
 will befriend them, then such are the Zaalimoon (wrongdoers
 those who disobey Allaah).”[al-Mumtahinah 60:9] 
Such people are to be fought against when [the Muslims]
 have the power to do so, and when fighting them and declaring jihad
 against them is more likely to serve a purpose. But when you can achieve
 your purpose with gentleness and kindness, it is not right to resort
 to violence and force. Muslims should only use force when they are compelled
 to, and as a last resort. They should not initiate fighting, unless
 there is some cause on the part of the kaafirs, such as their fighting
 the Muslims, or helping other enemies of the Muslims, or preventing
 them from following the path of Allaah and establishing the law of Allaah
 in the land. 
We should also remind these kaafirs of the massacres
 which have been carried out and are still being carried out against
 Muslims in all parts of the world, in Bosnia, Kosova, Chechnya, Palestine
 and Kashmir, which are being supported by Jews, Christians and others.
 Is the blood of the Muslims cheaper than the blood of others? Should
 there be mourners for non-Muslims who are killed and not for Muslims
 who are killed? 
Moreover, when the Orthodox Christians carried out massacres
 in Bosnia and Kosova, in which the numbers of those killed exceeded
 200,000, apart from those who were wounded or raped, and the economic
 losses that resulted, did the Muslims in the Arab and Islamic countries
 launch attacks against the Orthodox Christians who live in their countries,
 or kill any of them, or open fire against their churches and subject
 them to terror?! What does this tell you? 
It is very important for Muslims to explain these things
 to non-Muslims, in order to establish proof against the kuffaar. This
 is something that Allaah wants. Secondly, among the kuffaar there are
 intelligent and fair-minded people, and people who are receptive to
 the guidance of Islam; perhaps they will be affected by a clear explanation.
 Thirdly, no Muslim should permit himself to be accused without explaining
 his innocence. The distorted image of Muslims is one of the things that
 is keeping the kaafirs away from the truth and being affected by the
 Muslims; indeed it may make them treat the Muslims like outcasts, resulting
 in additional wrongdoing towards the Muslims. 
With regard to the question, it is permissible for a
 Muslim at times of tribulation, when they cannot walk safely through
 the streets or reach the mosque safe and sound, to pray at home and
 not attend prayers in jamaa’ah. But we must examine the situation more
 carefully before deciding not to attend Jumu’ah prayer because of its
 extreme importance. So we should not stop praying in jamaa’ah or stop
 attending Jumu’ah prayers on the grounds of mere speculation or an unlikely
 possibility of aggression. Rather if a person is certain or believes
 it to be most likely that he will be attacked if he goes to the mosque,
 then it is permissible for him not to go.
Among the opinions of the scholars concerning the permissibility
 of refraining from going to Jumu’ah prayers or prayers in jamaa’ah because
 of fear is the comment of Ibn Qudaamah (may Allaah have mercy on him)
 who said: “The one who is sick and the one who is afraid is excused
 from attending them – i.e., Jumu’ah and prayers in jamaa’ah – according
 to the view of most of the scholars. Ibn ‘Abbaas narrated that the Prophet
(peace and blessings of Allaah be upon him) said: ‘Whoever hears the
 call to prayer and is not prevented from responding by an excuse –’
 They said, ‘What is the excuse, O Messenger of Allaah?’ He said, ‘Fear
 or sickness, (otherwise) the prayer that he offers will not be accepted.’”
 (narrated by Abu Dawood, 1/130. Shaykh al-Albaani classed this version
 of the hadeeth as da’eef (weak), but he classed as saheeh (sound) the
 version narrated by Ibn Maajah, 793, which says: “Whoever hears the
 call and does not come, his prayer is not valid, except for one who
 has an excuse.”  Al-Irwaa’ 2/337). And Bilaal used to give the
 call to prayer; one day the Prophet
(peace and blessings of Allaah be upon him) came when he was sick, and
 said, ‘Tell Abu Bakr to lead the people in prayer.’” (al-Bukhaari, 633;
 Muslim, 418) 
Fear is of three kinds: fear for oneself, fear for one’s
 wealth, and fear for one’s family. The first kind means fearing capture
 by an oppressive ruler, or an enemy, or a thief, or attack by wild animals,
 or a flood, etc., which may cause harm to oneself.
 The second kind means fear for one’s wealth if
 one leaves home, as we have mentioned, such as oppressive rulers, thieves
 and the like, or fear that one’s house may be broken into or burned
 down or something like that; in such cases one is excused from attending
 Jumu’ah and prayers in jamaa’ah.  
The third kind means fear for one’s child and family.
 In all such cases one is excused from attending Jumu’ah and prayers
 in jamaa’ah. This was the view of ‘Ataa’, al-Hasan, al-Oozaa’i and al-Shaafa’i,
 and we know of no difference of opinion concerning this matter.”
(summarized from al-Mughni, 2/376). 
In Fataawa al-Shaykh ‘Abd al-‘Azeez ibn Baaz,
 when a man asked him about refraining from attending prayers in jamaa’ah
 because he was afraid for his wife, he said, “If there is some danger
 to your wife (at home) and she is not safe, and she is surrounded by
 things which give rise to fear, then he is excused for praying at home
 because of his fear for his wife…” Then he said: “But if your wife is
 not safe and the place is not safe, and danger is present, then it is
 o.k. for you to pray at home; this is a legitimate excuse…” 
Majmoo’ Fataawa Samaahat al-Shaykh Ibn Baaz
 (may Allaah have mercy on him), 12/42 
With regard to Muslim women, they should stay in their
 homes and not go out – as much as they can – lest they be exposed to
 harm. Their relatives and neighbours should help them to meet their
 needs so that they will not be forced to go out. This is a means of
 earning great reward by helping those who are in desperate need. 
With regard to Muslim men giving up distinctive Islamic
 dress and wearing the clothes commonly found in the kaafir society in
 which he lives, that is o.k., especially at times of persecution and
 harassment. Imaam Ibn Taymiyah said: 
“The Muslim in a kaafir country that is at war with the
 Muslims or otherwise is not commanded to differ from them in outward
 appearance, because of the harm that may result from that. Rather it
 is recommended or obligatory for men to resemble them sometimes in his
 outward appearance, if that serves a religious purpose such as calling
 them to Islam, or finding out about their true state of affairs in order
 to inform the Muslims of that, or warding off their harm from the Muslims,
 and other righteous goals.” (Iqtidaa’ al-Siraat al-Mustaqeem,
 p. 176). 
The
 words of Shaykh al-Islam Ibn Taymiyah must be understood correctly.
 He is speaking of special circumstances or cases of necessity; he does
 not mean at all that Muslims should become assimilated with the kaafirs
 and do evil things or drink alcohol with them or that Muslim children
 should go to churches and lose their Islamic identity. Rather what is
 meant is that it is permissible to forego distinctive Islamic dress
 – for example – and wear clothing of the type prevalent in the kaafir
 country, and to speak the language of the kaafirs, etc., in order to
 ward off the harm of the kaafirs, especially in an atmosphere that is
 charged with hostility, such as that mentioned in the question. 
Perhaps these events will give the Muslims who are living
 in kaafir lands unnecessarily and for no shar’i purpose the opportunity
 to review their situation and consider going back to the Muslim world
 and making hijrah from the land of the kaafirs. 
We ask Allaah to protect us and all our Muslim brothers
 from harm, wrongdoing and evil, and guide us to the right path. May
 Allaah bless our Prophet Muhammad and grant him peace.