Ohhhh, interesting. Didn't realize people voluntarily identify as skinheads when they're not racist. Thought it was an explicitly derogatory term for them.
Within the community (I used to hang out with non-racist skinheads when I was a teenager), they're referred to as "boneheads", as opposed to the "original" kind of skinhead, who claim to be descendants of the multi-racial (mostly black and white, many of these people were still shit towards south Asian immigrants) working-class communities in the UK who gave birth to skinheads back in the 60s.