The US is in a difficult situation. The more of these people that die in combat, the stronger the cause will become, it not only adds to Americas reputation, it also adds to the whole 'romantic' element which appeals so much to teenagers, 'fighting in a Holy War against the Ultimate Evil'. I wonder how many of these 'insurgents' are just kids who have foolish ideas of their own mortality? After all, it's only happened to other people so far.... After all, you are in the 'Right', just as the US is.
I remember a video posted of some 16-17 year old kid with an RPG. His arm was shot off and then he was shot in the head. Fine, he was pointing an RPG at something, so he got shot, that's war. However, one thing sticks in my mind, it's the look of complete disbelief on the boy's face as he stares at his arm, like he never believed he was going to get shot at, I think I will remember that expression for a long time.
There is just as much Villifying of America going on in Iraq as their is vice versa in the US. No-one wants middle ground. America cannot pull out because what they leave behind would be a bloodbath. So they are trapped, and chasing sects of militia is like herding cats anyway.
What is needed is an honourable disentanglement, for both America and the Iraqi people. The best choice for this is to hold a truly open election. Though I don't see that ever happening.