I have no sympathy for modern Indian Muslims, the animosity between Islamic amd Dharmic followers goes back to ancient times and is not going to be suddenly solved by debate or democracy. This was the only way.
Despite the unfortunate circumstances that happened, Muslims who knowingly stayed in India post-Pakistan are either not as serious about their faith as they would have you believe and use it as a political affliation more than anything or are simply agitators. Communists often push the blame onto them when terrorism happens so that may be something to consider as well.
This sounds very familiar to mainland Chinese communists trying to change opinion regarding their party by moving populations to Taiwan, dont you think?