But isn't it amazing how religion (and I mean all religions) can, at their nastiest, fundamentalist level, find the power to brainwash their young into committing such atrocities?
I understand what you mean when you talk about "nobodies" - this hard hitting, centred fundamentalism gives people a reason for existence, validates them, so that whatever is demanded of them, they will do.
(And before anyone says that Christianity does not do this - it did. Think of the Spanish Inquisition, the burning of witches and so on.)
"If you do not believe what I believe, you are wrong, and therefore cannot expect respect." We even see this attitude, to a much, much lesser extent, in some debates on here.
But the current atrocities are indeed horrifying; how to respond is a difficult question, since this a well funded, well supported movement.