Fortunately, most adolescents don't go this far.
If only neo-Nazism were an aberration of adolescence, wwh. Unfortunately, for some, it's a life-long career. I think you got closer to the truth when you explained that the profile of a typical neo-Nazi includes "extreme survivalist" because of the paranoia which distorts the neo-Nazi's perception of reality. The flip side of "white supremist" delusions of grandeur is the persecution complex, the fear that everyone else is 'out to get us'. These symptoms are all of a piece, don't you think, wwh? Taken together, they define both the neo-Nazi personality and the disease which afflicts this personality. That's why the writer's adumbration of the characteristics of a neo-Nazi is so revealing (at least pour moi).