My guess is that if he is not engaged in disinformation for our government (and if he is I certainly hope he is given a medal and a chance to redeem his reputation) or the Iraqis have a hold on him, either by blackmail or by holding someone hostage. He was in Iraq long enough to make friends or even have a romantic relationship with someone. This is just speculation on my part, but when I see SUCH a change, I feel the need to search for an explanation.