Saucycardog said:
No it wouldn't, for very obvious reasons. Think about the proximity of those two countries and WHY they hate each other.
Still not a world war anyway.
Pakistan hates India over a disputed province. India hates Pakistan because it's harboring terrorists who will/have/are kill/killed/killing Indian civilians and mostly are/will/did getting/get away with it.
As for Pakistan not using Nukes, I call bullshit, they whole sale sold their nuclear weapons program to whoever was the highest bidder, that kind of says they're not exactly anti-proliferation, which is a pretty good indicator, they'll use Nukes.