Bush didn't set up the Iraq war, he was set up by someone in the "intelligence" (and I use the term loosely) divison. He acted on false information and is taking the blame for it. Hell, if I'd been told that an enemy country posed such a serious threat, I would've acted similarly to the way he did.
Now, I still don't like Dubya, but I have become a little sympathetic towards him in regards to this war.