This is pretty much right on the mark:

I never believed that GWB actually tricked the nation on the “weapons of mass destruction” rationale for invading Iraq. Rather, the nation fooled itself into thinking that the war, in the first place, was anything but an act of vengeance for the gross injury of 9/11. After a couple of years, the public adopted the stupid narrative that they were “lied to,” rather than recognizing the difficult truth that 9/11 had to be answered with lethal force, that international hostilities are far from wholly rational, and that Saddam Hussein got whacked because he was the Arab head-of-state who was the best candidate for getting whacked.