Are you new here or is it just that you don't pay attention? The reason Bush said what he did right after the attacks is because he knew that what Osama bin Laden was aiming for was an all out war with Islam. In case you haven't noticed it, that's what they were trying to accomplish with the Israel/Palestinian situation, and it's what they are trying to accomplish with the India/Pakistan situation.
Part of winning is making sure you don't give your opponent what he wants.