Dudes claiming they are "old stock" or "heritage" Americans. They'll even call other white people who's ancestors weren't here before the Civil War "ellis islanders" and invaders.
As someone who's ancestry has partially been here since the 1690s.. it's a crock of shit and silly as fuck.
If you spend more than 5 minutes on 4chan you will learn that a good 90% of their fascist worldview is sexual insecurity.
Yeah I think it's best we not forget that a huge chunk of jim crow was about keeping "black beasts" away from white women (even though the vast majority of black men just wanted equality and could have given a fuck less about white women)
As for 4chan i spent 20 minutes on there one time and immediately saw one of those racist bait meme posts with a young black kid pictured saying something like
"hey cracker how does it feel I get more money and white pussy than you all day"
Trying to goad their sexual and financial insecurity.
God that site is a shithole
Sexual pathology as politics and so on.