Search "leightonwoodhouse substack black" and it should turn up.
Anyways, from that and another source I heard last year, basically, what folks call "Wh*** Tr***" in the US are people descended from poor rebellious criminal types that originated in the borderlands between England and Scotland brought here as penal colonists. Many settled in Appalachia going south, and have displayed criminal & violent tendencies (esp w/guns) as well as terminal unemployment or lack of upward mobility ever since. Granted, Appalachia is somewhat limited in opportunities, but we still see them this way after they later radiated westward in the 1800s and then north in the 1900s.
You can literally trace this specific demographic back to those roots four centuries ago. It isn't just some style picked up by the less ambitious in them states. The culture is so ingrained, some have even wondered if these less savory behavior patterns have a genetic component.
Other people settling in that area (such as the descendents of former slaves) immersed in that culture for centuries have also displayed a propensity for such behavior, and when they as well as their WT neighbors migrated to northern cities looking for jobs in the 20th Century, they brought it with them, thus inner cities life subject to much criminality and lack of aspiration.
No need to point of that most people at MAGAt rallies and Jan 6th rioters have a certain 'look' we're all too familiar with. Trumpers, as with much of the GOP base, are all too typical of this recognizable ilk. Trump has managed to tap into them, telling them what they've always wanted to hear, allowing them to feel they can be their real selves. He didn't make them be this way, he simply unleashed them from the yoke of civility society has imposed upon them, a society they have no qualms expessing their disdain for. He made it ok to be W**** T**** in the most negative way they can.