The behavior of these fools at Abu is, actually, typical behavior of unsupervised low level prision guards. The temptation to use and abuse power by the otherwise powerless is a powerful and addicting temptation.
The problem was , as usual, a failure from the top down. Former Gen. Karpinski failed to supervise, and when an officer complained, STILL failed in her leadership responsibilities. She got off light, and should have done some barbed wire hotel time too.