The underline story is fascinating, this doesn't do a good job telling it. It is confusing, drops some interesting stories, and stay with some less interesting stories. Don't start telling us a story and then not finish it. If you can't finish a story you tell us why or don't put it in. We do see enough to understand this group is awful, but we don't get a clear enough picture of how bad they where. I hope there is another documentary made that will help us understand the pain they caused.