Snek flag chuds are at the core enamored with European white mythology. If you want to convert them, you're gonna have to convince them to see the evil the identity has caused all throughout history.
Conversion would be nice, I’m thinking smaller at first though. Something more along the lines of: can they be convinced “don’t tread on me” includes oppressive state forces like police? If you can get them to view police as the enemy (which theoretically doesn’t seem like a stretch for “libertarians”, although reality varies), can you then convince them to work that enemy?
"Under no pretext should arms and ammunition be surrendered; any attempt to disarm the workers must be frustrated, by force if necessary."
That quote helps for convincing that you don’t want to take their guns, I’m wondering if you can convince them to take cops guns