iraq, war, premature pullout

Being a news junkie, I am always intrigued by the stuff that goes on around the world. National Holiday declared for the american pullout from the cities. The admittance that Iraq will probably fall back into a feudal dispute. The fact that really the oil interests of the US of A was the reason for the overthrow of Hussein (not WMDs). Wonder why we could have not used our covert diplomacy to overthrow the goverment? Seems like the Kurds, Suunis, Shites, and whomever else will start using US and Chinese weaponry to beat the hell out of each other . . .