To reiterate this comment from a few days ago:
This anthropologist spoke before the UN about Islamic radicalization. It's not hard to see that a similar sort of radicalization is happening to white men in the US, and Europe for that matter: https://www.youtube.com/watch?v=qlbirlSA-dc
In both cases the target are people who are aimless, and they're promised a cause to fight for, add a bit of religion because it's an undisputable "Truth" (never mind that the Truth is whatever the leader declares to be true).
Despair is a terrible advisor, often worse than fear.