man, I am not sure if the people who lived in indus valley were hindus... I mean they were most likely not hindus if you go by history strictly, there is no evidence.
Anyway, you are digressing from what you said, my assertion is nuclear blackmail works upto a point(pakistan's own territorial integrity is not violated) but not when pakistan tries to invade part of any country. Even afgans wont take that sh*t nor will Iranians. Why do you think Indians will do. I mean you really think Indian leadership will say oh they got nukes, tough luck, let them occupy whatever bit they are on, coz even if we nuke all of them they will destroy all hindus. Thats not how our leadership thinks, I am pretty sure you know that.