Shout them down in every space, make them embarrased to think the stupid shit they think.
If we don't embarrass and correct them now we will have to kill them later when they come for our friends and families.
Man, feel like Norse iconography might be almost a lost cause here. I was looking into getting a Thor's Hammer tattoo years ago... Every variation you can think of has been co-opted by a Nazi group somewhere. I think it was the FBI that used to keep a database of symbols linked to terrorist groups, most of it was various flavors of Nazis and most of that was symbols stolen from Norse culture.