There are human beings that like the music and own shirts of Burzum that are not trash, or racist, or burn churches or do in any way sympathize with Varg Vikkernes fucked up ideologies (that he mostly left out of the music). You can criticize people for liking music of criminals, your choice, but if you call them trash human beings for only being a fan of something how do you call criminals like murderers or rapists etc? Forget it, i probably don't want to know.
People should do what they want off course, i don't believe it will have a great influence on sales either way. As for your comparison it depends on the case for me. Does it influence the game in a negative way? Loot Boxes and microtransactions can hurt games. If a game is propaganda and shoves its ideology (be it left or right) straight in your face it can hurt the game too. Don't see it in this game tbh.
I will buy the game cause it's interesting and has an unused setting. Not every game needs black characters, or chinese characters or white characters ( i know they are overrepresentated, but this little polish game is not the place to argue about that imo) and in this case it makes sense. Vavra being burzum fan or even saying some not so intelligent things while fighting on the internet doesn't hurt the games quality. But like i said, everyone can spend his money on what they want, nobody is forced to buy specific games.
