I think we all agree that OP does in fact make a good point, and musical interests can certainly coincidence with political tendencies. Why exactly, though, is what needs to be drilled into. I think subgenres matter here. For example - fans of black metal I've known tend to be left leaning more so than fans of NWOBHM. Why is that?
My own primary disinterest in politics or exact definitions therein aside
I'll admit I don't know much and never cared much about the political subgenres. Maybe it would be needed for this conversation. But that's what you're all here for.