Weird. Looks fake to me and some decent points to back it up. I have no idea, but if you have the stomach click the link. Im a very suspicious person usually so I'm sure that makes me want to believe it is a conspiracy to get us into a war. I'm pretty agnostic about it at this point.
http://businessofemotions.org/2014/09/03/the-deceptive-decapitation-of-mr-james-foley/
http://businessofemotions.org/2014/09/03/the-deceptive-decapitation-of-mr-james-foley/