What does it matter what some historical US nationalist movement was going for? "Ethnic nationalism" is clearly what's gaining traction the world over, and bein

What does it matter what some historical US nationalist movement was going for? "Ethnic nationalism" is clearly what's gaining traction the world over, and being discussed. They use the not-unfamiliar conflation of race/religion/nationality based on some ethnic mythos, to equate patriotism with purity of a local monoculture. Is there some "true nationalist" group out there of any prominence?