I watched documentaries about hatred groups in America at NatGeo. Dudes who were shouting "white power" looked like boy scouts to my eyes. Ridiculous. I could not but laugh... They are just like hooligans (crazy British soccer fans).
Why do people join those groups? Job competition, especially low paying jobs, between blue color whites and immigrants explains somewhat. But I think the extreme boredom in American country side might allure frustrated people to those groups. I could read from young Klansmen's eyes that they love their role playing. It is a pity that those people do not know how to enjoy life. In particular, bars and night clubs in country side are pitiful. Even in urban areas.
So, to solve the problem of growing number of hate groups in America, I suggest to have more and better bars and night groups in America. Better night life could reduce those poor people's frustration. It will apply to Muslim extremists. Unfortunately, Muslims do not drink. We need find other good entertainments for these extremists. Holy dance night club, probably?