I browse 4chan a lot so I can understand the mentality behind it.
Basically, a lot of people are fed up with the bs that is the status quo in Germany, and turn to Nazism out of spite. If you get demonized as a fascist for being a patriot, then some people literally are saying, “You know what, I am a Nazi! Sieg Heil and screw you!”
Plus a lot of people who are somewhat are of the brainwashing are falling for the Whitewashing of the Nazis as being these Anti-communist warriors that many fall victim too.
People are tired of people denying that the Soviet’s were just as bad if not worse than Fascism, so some delude themselves into whitewashing the Nazis to force the point.
So, because the right-wing is so damaged and suppressed a lot of people that would be normal Nationalists or at worst Reactionaries (which I don’t really see as “bad), are being pushed into Neo-Nazis.
Observe how Julius Streicher illustrates the fact that the cultural/human nature of the underlying condition - had been festering for a long time:
http://www.freerepublic.com/focus/news/3511044/posts?page=38#38
In the LCMS, Luther is quoted profusely in the context of a religious organization whose school curriculum and clergy NEVER addressed what Streicher was referring to.
Having attended LCMS schools from elementary through University - I find that omission disturbingly negligent.