They should be but in 1962 during Ayub Khan's reign the borders were closed and people were not allowed to move across the border. I know people who have been moved from parts controlled by India and our distant members have been moved from Hyderabad where there was severe persecution after operation Polo. Both my parents were born in Lucknow which is now in Andhra Pradesh in India.
We did very bad with the Biharis as well. We left them stranded when Bangladesh was formed even though they fully supported Pakistan. My uncle from Lucknow told me that Indian muslims once completely supported Pakistan and there would be bets in cricket matches where Muslims betted on Pakistan winning. Slowly we have been losing the Indian muslims and perhaps thats the reason for my identity crisis. I want to merge as a Pashtun. Sounds crazy but I am fully committed to acomplishing this goal.
We Pakistanis have made huge blunders since the death of Quaid E Azam in 1948. Today the Indian muslims are integrating within India. Its our fault for abandoning them, not theirs. They could have been useful allies in any war against India.