It needs to be said again I guess, this has nothing to do with background & everything to do with having a screw loose. Normal people don't do things like this, period.
It's time we all got over the nonsense that all cultures and religions are equally valid or worthy. They most certainly are not. While Christianity is a religion of peace, founded by the Prince of Peace, Islam is a religion of war and violence, founded by a man who routinely chopped the heads off his enemies, had sex with nine-year old girls, and made his wealth plundering merchant caravans.
Is this guy for real? Not much of a history buff, I suppose.