This reminds me of what Yuri Besmenov said in 1984 about Communist sympathizers like Jane Fonda in the West. That once Communists actually took over in the U.S, people like her would be the first to be killed. Islam has so many similarities to Stalinism. So it makes perfect sense that a useful stooge for ISIS would end up beheaded by them.
This reminds me of Timothy Treadwell. The guy who went to live with the bears - until they ate him.