This article from The Economist is a little critical of America's overuse of force. An excerpt:
The almost daily rioting in the camp is caused not just by the awful conditions-flies, dust and heat-but by the resentment of people arrested willy-nilly by the Americans. Another officer gives examples. A goatherd has been arrested, so his goats roam untended; a man has been brought in, bruised and handcuffed, for asking an American patrol for help for his wounded daughter.
I think the military is probably just being a little over-cautious right now. With fedayeen in civilian clothes shooting at them, I can understand why.