From what I was able to pull from that with my rusty Spanish, the neo-Nazis are against these "Pokemon" people because of the type of fun they have and the sexual ambiguity they practice. Sounds like typical skinhead behavior.

I certainly wouldn't want to be one of those Pokemon people, I hope this gets stopped before it goes too far. As for how this would impact the actual Pokemon franchise, I wouldn't worry, nobody takes skinheads seriously (except other people like them). People do take religious leaders seriously, and we saw how well they did in their campaign against the actual Pokemon franchise. I don't think this will do much to ruin Pokemon's reputation.