Supporting the oppressed God says in verse 75 of Surah An-Nisa...

Supporting the oppressed God says in verse 75 of Surah An-Nisa: وَمَا لَكُمْ لَا تُقَاتِلُونَ فِي سَبِيلِ اللَّهِ وَالْمُسْتَضْعَفِينَ مِنَ الرِّجَالِ وَالنِّسَاءِ وَالْوِلْدَانِ الَّذِينَ يَقُولُونَ رَبَّنَا أَخْرِجْنَا مِنْ هَذِهِ الْقَرْيَةِ الظَّالِمِ أَهْلُهَا “So why is it, that you do not fight in the way of Allah, and of those who, being weak, are men, women, and children who say: ‘Our Lord, bring us out from this village whose people are harm doers” According to the verse, the fighting for the liberation of the oppressed from the oppression, supporting the faithful brothers, and the repulsion of oppression from them is obligatory because, from the Islamic point of view, indifference to the cruelty against those who being weak is a sin.