However, these are the people who saw heads off, videotape the act and post the video on the internet. At a certain point, cries of, "They couldn't! They wouldn't!" become largely irrelevant. It's a plain fact that these people are capable of unspeakable atrocities. We know that. But we still haven't really accepted it.
You are right on that point.
On a side note, after GW I, I attended a desalination conference in DC. The guest speaker was the Kuwaiti Minister of Water, whose speech to us was quite moving. I still have a copy of the book of photographs that gave testament to what these people are capable of.
This story, though I agree with you, I will remain skeptical until more information is available.