I've got to agree with Jay though. There will always be a percentage (though I don't think 10%) of people that are just plain f@#ked up. There are sadistic, animal torturing muslims, blacks, whites, hispanics, asians, non-military and any and every other group you can think of on the planet. It's not an American/British Military exclusive. I've seen plenty of awful videos of animal abuse. A lot more are not in the military than are.
It's a truly disturbing thing to see, and I'd like to meet a few of those people and dish out a little bit of justice, but it can't be blamed solely on being a soldier in iraq. I'm not trying to justify what they did though, they should be strung up by their nuts and left in a public area with a video of their actions playing behind them.
Jennifer Lopez is responsible for many more cruel animal deaths than those guys will ever rack up. Google those videos, and you will be TRULY disturbed.