So you think millions and millions of Islamic people are psychopathic for supporting ISIS?
Part of the problem is people suggesting that ISIS is misinterpreting the Koran, and not actually following scripture... Which is wholly untrue... ISIS is really the first organization to really follow scripture, and sharia in hundreds of years. They have established the first Caliphate in a hundred years, and consider even previous one's false as they did not fully follow Sharia. ISIS follows it literally, to the T. This isn't a religion being manipulated or misinterpreted or modified... it's the full expression of a medieval religion gaining traction in a literal fashion in the modern world. ISIS wants that Medieval world back, and so do their followers.