Terrorism is not a personal attack, so Ladin is not the ONLY guilty one about those attacks, but he is one of the most dangerous ones, considering the old actions he had made against innocent people. There's an old Turkish saying,
"If you cut the head of the snake, the rest will be easier to destroy." and that's what USA is trying to do.
And about the terrorist attacks against USA or any other country, those are not against a nation or any other thing except HUMANITY.
My thoughts on this subject is NOT subjective as I'm not an US citizen.
Any crime against humanity should be punished as soon as possible...