Sad news, but I see this as the same situation as the guy in the Grizzly Man movie. When you start to think that animals are not really animals, they'll prove you wrong every time. ISIS has the added element of being truly evil, so this poor guy never had a chance.
"I believe in a Spinoza's God who reveals himself in the harmony of all that exists, but not in a God who concerns himself with the fate and actions of human beings."
--Albert Einstein, 1929