Tarek Fatah, who's received a lot of adulation by the Indian Hindu diaspora and been an honored guest Hindu Nationalists in India, called for dissolution of India in an interview a few years ago:
Tarek Fateh calls for dissolution of India into multiple nations
"India, the whole sub-continent, you see it was never been one country....even during the British, India has not been one country under Ashoka, not even under Aurangzeb
The future that I see, if I had my dreams come true, something like Europe, the entities that exist are Bengal. Punjab with no borders, common currency,
there's more in common between someone in Lahore and Delhi than between someone between Delhi and Madras.
Break-up of India, that's my analysis of what will happen in the future, if it's ever dissolved voluntarily, would be best thing to happen to India, like Europe has.