Brotherhood in Islam
The importance of brotherhood in Islam can not be over stressed. There are many hadiths relating to the fact the Muslims are a single united body, each part responsible for the other. Accordingly if one of the parts is injured or hurt then the rest of the body immediately feels that pain and is certainly uncomfortable at the situation until it is rectified without delay. The brotherhood of Muslims is a very deep and wide concept that gaurantees the safety and well being of the Society at large. Islam being a complete way of life is primarily for the society, it promotes a healthy and a well disciplined life style in every sense of the word.
It is forbidden, for example, for two Muslims to start a whispering conversation in the presence of the third. This might offend the one left out and weaken the Brotherhood. It is not permissible for a Muslim to sever relations with his brother for more than three days.
"It is sufficient evil for a Muslim that he should look down upon his brother. The life, wealth, and honour of a Muslim are inviolable by another Muslim" [Sahih Muslim].
Brotherhood is synonynous with Islam. It is a force for good, a purveyor of peace and justice for everyone. It provides stablility in a quarrelsome world. To the downtrodden and oppressed everywhere in the past, it provided freedom. When it was powerful, it even saved the Jews and Christians in Palestine and Spain from each other.
Muslims are not allowed to kill the women and children of their enemies even in war. How could we support the killing of our own women and children? A Muslim is not really a believer if he eats his full while ignoring the plight of a hungry neighbour. How could a believer then participate in economic sanctions designed to starve his own people to death?
When giving commands regarding the Islamic Brotherhood, the Quran uses a beautiful style with a profound message.
But when you enter the houses, greet one another with a greeting from Allāh (i.e. say: As-Salāmu 'Alaikum - peace be on you) blessed and good. Thus Allāh makes clear the Ayāt (these Verses or your religious symbols and signs, etc.) to you that you may understand. [Surah An Nur Ayah 61].
O you who believe! Let not a group scoff at another group, it may be that the latter are better than the former; nor let (some) women scoff at other women, it may be that the latter are better than the former, nor defame one another, nor insult one another by nicknames. How bad is it, to insult one's brother after having Faith [i.e. to call your Muslim brother (a faithful believer) as: "O sinner", or "O wicked", etc.]. And whosoever does not repent, then such are indeed Zālimūn (wrong-doers, etc.). [Surah Al-Hujarat Ayah 11].
O you who believe! Eat not up your property among yourselves unjustly except it be a trade amongst you, by mutual consent. And do not kill yourselves (nor kill one another). Surely, Allāh is Most Merciful to you. [Surah An-Nisaa Ayah 29].
The message is clear: Whatever is happening to others in the Brotherhood, is actually happening to yourself. Any aggression against any part of the Brotherhood is an aggression against all of it.