You came back to point 0.
Political infighting can never separate a state unless the common mass is agitated with administration. If that were the case every country would've divided it's enemy into pieces.
I'm not talking about religious separation. I'm talking about the idea of religion behind separation. Idea of 2 nation theory was that Muslims need their own country to live happily ever after. Since East Pakistan separated, it proved that religion is NOT THE ONLY BINDING AGENT of a state.
Since there are more Muslims in India than whole population of Pakistan, And they are proud Indians. So you can not define nationality based on religion.
We do not need to explain anything to anybody. Did China explained International community about Tibet? Naah.
Money Talks.