Uuuuh, what a tough topic =)
I think that all the campaign wasn't planned out as well as it should have been. And now the U.S army is dealing with the results. Now, I don't know how much of a threat Iraq really was, but I don't think that Bush sent the army there just because og the oil. And I remember that before the war in Iraq, it was considered here (in Israel, that is) a real threat to the existence of the country.
Oh, and I kinda agree with Nori. Theleaving of U.S Army won't lead to the peace in Iraq. The U.S completely disordered the traditional power sustem - the Sunni are in the lead, and Shii (sorry, don't really know how to spell that ^^') get no politic power at all, despite them being the majority of the population. Now it's all reversed and there's a civil war between the Sunni and the Shii...