How about Mexico return Baja to Las Californias - I bet if there was a vote the residents of Baja would prefer to be American.
What pisses Pakistan off is majority Muslim state of Kashmir is still part of India. You may know Pakistan was formed in 1947 by dividing then existing India into 2 countries. Pakistan landmass was strictly on Muslim population majority in the area, and Pakistan has official religion..ISLAM.
while what remained as India adopted no state religion.