no doubt US is in mess, the same as in vietnam, or russians in afghanistan, indians in shrilanka. the best way for us is to forget oil and run back.
i doubt if shias of iraq or some other community people are fighting for motherland or a lot of them find an opportunity to get killed for religious reasons.
a question...will iraqis stop bloodshed after us leaves? i bet 'no'.
after sometime people will forget and no one will blame us for iraqis killing iraqis after them.