After nuclear war, Pakistani will be dead. ALL of them. Indians will be alive, about one billion of them. Ponder over it. Politics does not trump lives.
How old are you little Indian rat?
Even if your stupid childish theory of killing ALL nationals is taken, Pakistan FAR exceed the number of nukes as compared to India. Pakistan beat India in number games. Since Pakistan has got first strike doctrine, it's you lot who will be wiped out from exsistance with many nukes dropped on your sorry arses.
But in reality, not all of nationals will be killed, only cities, militaries, strategic locations, financial hubs etc. Basically you will lose the state machinery to govern your country. In this situation, you shitholes have more chance to disintegrate since you are already a lose union, whereas Pakistan is a federation.