Good idea, perhaps you should preach this also to Pakistan [Balohchistan], China [Tibet, East Turkestan], Nepal [Madhesis], Bangladesh [Chittagong Hill Tracts, Buddhist Tribals fighting for freedom], Srilanka [Eelam]and to Iraq even [the Kurds want seperation]. Tomorrow if some district in India decides that it wants to seperate, I suppose we should allow them according to you.
Going by your dangerous logic, no country can survive today. Even the freest of the free nations, the USA fought a civil war to maintain its unity.