From the Herbert piece:
Mr. Delgado said he had witnessed incidents in which an Army sergeant lashed a group of children with a steel Humvee antenna, and a Marine corporal planted a vicious kick in the chest of a kid about 6 years old. There were many occasions, he said, when soldiers or marines would yell and curse and point their guns at Iraqis who had done nothing wrong.
He said he believes that the absence of any real understanding of Arab or Muslim culture by most G.I.'s, combined with a lack of proper training and the unrelieved tension of life in a war zone, contributes to levels of fear and rage that lead to frequent instances of unnecessary violence.
In November 2003, after several months in Nasiriya in southern Iraq, the 320th was redeployed to Abu Ghraib. The violence there was sickening, Mr. Delgado said. Some inmates were beaten nearly to death. The G.I.'s at Abu Ghraib lived in cells while most of the detainees were housed in large overcrowded tents set up in outdoor compounds that were vulnerable to mortars fired by insurgents. The Army acknowledges that at least 32 Abu Ghraib detainees were killed by mortar fire.
Mr. Delgado, who eventually got conscientious objector status and was honorably discharged last January, recalled a disturbance that occurred while he was working in the Abu Ghraib motor pool. Detainees who had been demonstrating over a variety of grievances began throwing rocks at the guards. As the disturbance grew, the Army authorized lethal force. Four detainees were shot to death.
Mr. Delgado confronted a sergeant who, he said, had fired on the detainees. "I asked him," said Mr. Delgado, "if he was proud that he had shot unarmed men behind barbed wire for throwing stones. He didn't get mad at all. He was, like, 'Well, I saw them bloody my buddy's nose, so I knelt down. I said a prayer. I stood up, and I shot them down.' "