Not to mention, in recent years there's been a rise in adoption of Nazi symbology: 88, Nazi salute, swastikas obviously, plus co-opting of Norse runes and symbols they perceive as associated with the Aryan race.
But it's not just Nazis that are the problem. They're clearly in the minority. There's growing interest in garden variety fascism. Some of the hallmarks of that are nationalism, militarism, submission to authority, anti-intellectualism, fomenting fear of "the other" and outsiders. Umberto Eco has a list [1] that encapsulates and explains these. And, I'm sorry, but a lot of these describe the trajectory of the current Republican Party, especially under Trump's rule. (note: I think the GOP has largely abandoned what we would call "conservatism". Even though many of those left in the party might self-identify as conservative, they have veered into fascist ideology, they just won't admit it)
[1] https://www.openculture.com/2016/11/umberto-eco-makes-a-list...