The invasion was not a mistake. The "nation building" was the mistake. Iraq would have been fine had we toppled Saddam and then left well enough alone. We didn't. We had to attempt to impose Christian ideas (such as equality) onto a Muslim Culture.
Paul Bremmer is the man responsible for screwing up Iraq. His decision to disband the Iraqi army was one of the biggest pieces of idiocy of which I have ever heard. It was only exceeded in stupidity by his decision to ban all Bathe party members from government employ.
But what really screwed up the middle east is electing an unqualified simple minded petulant fool, just because the the thought of having a "black" president gave Liberal Media Democrats Orgasms.
That was the real disaster for the middle east, and indeed for the larger world beyond it.
You cannot simply go into a country, break it, then walk away and say, ‘Hey guys, you’re on your own.’ Imagine if we’d done that in Germany in 1945, the Red Army would have swept all through Europe.