It is sad that the founding fathers of modern India decided not to have a state religion (which would have been Hinduism). Thus they gave away too much -
A separate state was created for those who wanted nothing to do with Hindus, and total freedom was given to those who chose to stay on with the Hindus.
They were short-sighted, they did not see how this freedom could be abused in the long-run. They acted with typical large-hearted Hindu generosity and trust and openness.