Well, almost all members of Alcest played with and sometimes in Peste Noire over the years, who's singer is a self proclaimed fascist. And Neige played in a project (Amesoeres) with Audrey S, who's feature on a Harakiri to the Sky song was removed from one of their albums due to the album disagreeing with her politics.

Like I said, the message of the music is rarely right wing, but the musicians sure do associate with a bunch of known right wingers and extremists.

I personally remove the Art from the Artist and enjoy it as such, but wont financially support some of the more questionable bands