Let’s start off with one major premise that those stories missed. Foley’s death was absolutely staged for the cameras. The very nature of terrorism is that it is staged. What separates ordinary barbarity from terrorism is that the latter is by definition a gruesome performance art.
Terrorism is about headlines.
So why would ISIS fake it? Firstly, and it’s only speculation, is the possibility that Foley and his killers struck a deal: He reads their message to America clearly for maximum impact and plays along with the cameras in exchange for a quick death later.