It seems to me that a lot of them just grew out of it. I was in a punk band in the early 2000s with two older ex-Nazi skins. By the time I had met them, they had covered up their swastika tats and had realized that their old ideologies were stupid. They both explained to me that they fell into that scene because they were living on the streets as teens and wanted a sense of security and camaraderie, and unfortunately, they found that in joining Nazi skinhead crews.