Funked, if the killing starts as you suggested, how could anyone consider this a liberation ? You won't have peace there in thousand years, until US troops leave. And it is my understanding there will be no peace now, until US troops leave the country.
If you have to use barbed wire, threats, ID cards and checkpoints to stay there, what does that make you in their eyes ?
US troops are already considered aggressors over there. No ? What do you think, what would happen to a single US soldier who decides to go take a walk unarmed in downtown (insert any Iraqi city here) ?