Kashmir is not scotland where you can conduct referendum and decide the future of Kashmiris. India and Pakistan fought 3 wars and you expect any one nation going to let go of their territory without fight. If you think it will be a cakewalk then you are living in fools paradise.
Why do you think UN security councill resolution no 47 never saw daylight??? Because of Pakistani intransigence.
United Nations Security Council Resolution 47
The resolution recommended that in order to ensure the impartiality of the plebiscite Pakistan withdraw all tribesmen and nationals who entered the region for the purpose of fighting and that India leave only the minimum number of troops needed to keep civil order. The Commission was also to send as many observers into the region as it deemed necessary to ensure the provisions of the resolution were enacted. Pakistan ignored the UN mandate, did not withdraw its troops and claimed the withdrawal of Indian forces was a prerequisite as per this resolution.
[20] Indian claim is that Subsequently Pakistan refused to implement the plebiscite until India accedes to it and continued holding on to the portion of Kashmir under its control