Just looked up what “NSC” means. It’s National SOCIALIST Club.
Not to be mean, but you’re totally wrong.
NSC means “Nationalist Social Club.” 131 is the alphanumeric code for ACA, or Anti-Communist Action.
I’m not seeing any evidence that this is indeed a nazi group, or a white supremacist group. Just innuendo that they’re connected with other groups that have been smeared by the media.