If I had to patrol the streets of Baghdad I would do the same thing. They were careful to avoid pedestrians and all they did was give little love taps anyway. They knew that they were in danger and that their presence was a danger to everyone there. Overall, it looked very professional.
That being said the fact that they have to do that indicates lack of control. The whole damn country is a mess. There needed to be some sort of plan
to occupy the country after the expected easy victory over the former Iraqi army. Too few troops, no securing of weapons caches, dissolving the army ("by the way you're all fired, please leave your guns and explosives on the way out").
This is not an army problem. It's a leadership one.