Cosmic Yak
Philosopher
But as for Dubya and his sinister coterie, all the evidence suggests they had no involvement in 9/11 and simply took advantage of it. The simplest proof of this is that there was no obvious finger pointing at Iraq - which there should have been if they had orchestrated it.
True. Bush and the neo-cons- as well as Tony Blair- were angling for a pretext to invade Iraq from the very early days of the Bush administration.
Also, as you rightly say, if they had somehow set up the 9/11 attacks, they surely would have used at least some Iraqis in it. This points away from the conclusion that the attacks were designed to facilitate an invasion of Iraq, and also, of course, Saudi Arabia was and is an important ally of America in that region. It would seem utterly pointless to create a plan that would simultaneously not give any solid reason to attack Iraq, and also embarrass America's strongest regional ally.
Once again, then, we are left with no obvious motive for staging an inside job, even allowing for the known incompetence of the Bush administration (and presumably, then, to paraphrase Rumsfeld, the unknown incompetence of the cock-ups we still haven't heard about).