Nazi punk bouncer

So, it turns out a bouncer at the place I work is a nazi punk.

I found out as I asked what sort of music he was into... he said punk and whent on to say that skrewdriver is is favourite band and showed me a tattoo of their logo on his calf. Obviously alarm bells started ringing in my head and I said "they're very racist right" and he responded with "yeah, I'm a very racist person" and went on to show me an ss tattoo on his wrist and 1488 on his fingers.

I'm the only person who is aware of this and I'm unsure how to handle the situation. If I report him to a manager he's going to know it was me and he seems like a dangerous person who isn't adverse to brutality.