the average radical, "neonazis" in this case, is far more interested in being a cultural underdog, being counter culture and street fight junk than they are in any higher calling. this makes these people easy to recruit into other groups that promise the same shit, like anarchism
the flip side to this is that anarchists are just as easily converted into becoming neonazis. you'd be suprised how many white supremacist types were originally anarchists, and vice-verse.