

Alternative rock is fine.
In my language, ‘alternative’ is somewhat synonymous with ‘progressive’ (though we still have the bullshit meaning of ‘alternative facts’, ‘alternative medicine’). Is that not a thing in English, too? We rarely have an original thought when it comes to words like this.
I think there has been a certain amount of cultural change in the rightwing - used to be they just considered themselves the status quo upholders, the ones who were subversive were hippies, educated-but-not-rich city-dwellers, artists etc… Now that more progressive forces became somewhat mainstream and the rightwing radicalized, major parts of the rightwing have adopted a more subversive identity and messaging.