As a Scandinavian all I can say is good luck with changing things. Don’t get me wrong, I certainly wish I could wear the Thor’s hammer necklace that I was given as a baptismal gift (I know, I know) without being associated with all sort of nonsense. But that’s just how the world is these days. I don’t really mind most of the cultural appropriation by the way. I think things like the Marvel Thor, the NFL team, the horned helmets, the ridiculous tv shows, and, the Speedo wearing blood bowl team are all amazing. Sure those things are over the top, historically incorrect and rather stupid, but they also come from a sort of loving place.
What I do mind is the failed men who run around pretending to be manlier than they are by stealing our culture and turning it into something hateful. I know I sort of look the part of Hitlers secret fantasy, being a tall Scandinavian with undercuts and a moustache, but I’m really not right wing and it bothers me when I’m associated with hateful assholes because they’ve appropriated my cultural heritage.
It’s the way the world is, like I said, and I think you’ll have as much hope of removing the horns from the helmets that you will trying to make the broader international society understand that Viking is something you did not something you were.