I have to say I don’t know any white supremacists nor do I know anyone who claims to know any white supremacists. Nor have I ever met any white supremacists. However, I have met some radical Marxist nutjobs, and it took a very short time before I walked away with the thought what total a$$holes. I also had other thoughts, but I’m not going to put those in writing.
Same here, and I grew up in and live in the "Deep South".
I haven’t met a (active) white supremacist in decades and the ones I did meet never wanted to “destroy the state”.
Just 3 years ago I think, when the Brianna Taylor and George Floyd protests were going on I was in downtown Liberalville Ky for a purchase of something. We happened to end up in our car right across the street (as in 20 feet or less) from a mixed lot of BLMTIFA types (maybe 50). A tall black fellow was on a bullhorn and was clearly and loudly calling for revolution, ending of our country. In no uncertain words, like the photo link I shared in this story.
Biden calling them the greatest threat is a simple propaganda technique called Deflection, specifically Projection or putting the blame of what one is actually guilty of on the opposition.