Well, I'm not going to defend the mistreatment of any human, American, Iraqi, or otherwise. But I will try to get you to understand why this is happening.
Imagine, if you will, that you are an Iraqi soldier fighting against the Americans. You may or may not be loyal to Saddam, but that doesn't matter, because you HAVE to fight for him. Now, your company has been getting slaughtered, and everything seems hopeless. You have no idea what is coming next, whether it be death, or something else. You are scared, not scared, but I mean REAL SCARED. You just want to live, you don't care what else. That's what happens with war. It dehumanizes you to the basic concept of survival. Then all the sudden by chance, you catch some Americans as POWS. Now these are not just enemy soldiers, these are the same people that have killed many of your friends and family through bombing and shooting. Are you going to act rationally to these people who are part of the machine that is devasting the world around you. Proabably not. Nope, you are probably gonna beat the sh!t out of them to get some info to help you survive, and if that doesn't work, you kill them, because unlike the Americans, you don't have the luxury and equipment to treat them humanely. They would be too much of a burden and would probably get you killed. So you kill them. Pure and simple. I know this is horrible, but this is war, in all of its glory. War turns men into animals and the reality is the only thing that comes from war is pain and suffering. If the tables were turned, I'm sure we'd be doing the same thing. Of course, we did do the same thing in Vietnam when we didn't necessarily have the upper hand. I'm not defending the Iraqis, but I certainly can see why they are doing it.