Trying to control a country and a military that fell appart so quickly would be beyond any capability of the US Army. As for treating the Iraqis better, lets just say the military are not social workers and policemen. It is very difficult to weed out the decent from the bad when everyone is yelling in a language you dont understand,and waving and shooting guns. As for protecting sites of national importance, they did take out explosives from shell casings using solid shot to disable the guns so as not to destroy the Mosques that Iraqi tanks and artillery were placed in and around.

Yes there are things that could have been handled better, but if given a choice I would rather surrender too, or be captured by a US soldier than a terrorist.