And what is the source of that extremist ideology?
That is the real question.
That is an altogether different issue, & not the one being discussed here. Are you saying Islam has no place, & the people who practice it have no right to live in India? And this is a thread about the source of extremism in the region that is India & Dar Uloom Deoband, not Islam. Please don't bring Islam in here, it's not the issue being discussed here. If you want to bring up Islam, go to some other thread.