Why would that be so surprising?
The weak suits at the pentagon and our weak politicians, thanks to the media and the corrupt left-wing politicians, have bound the hands of our military and their interrogators and the prisoners know it. We prosecute our soldiers if they shoot a terrorist in self-defense, or if they are too harsh when interrogating a known terrorist. The enemy knows this and uses it well to their advantage. The left-wing media is their best friend.
Even if the Marines have their hands tied, insulting them is a stupid thing to do. You don't have to torture someone to make his life a living hell. Sensory deprivation is allowed, and I'm sure there are other methods of punishment for prisoners who throw feces. So I'm curious.