It’s a long answer which I’ve offered before but don’t have time to now — it involves perceived and real wealth and opportunity inequality, grievance holding, racism, social media, misinformation, demagoguery, stupidity, cognitive dissonance, the age-old ballet between “sophisticated” educated urbanites and rural bumpkins, resentment, revenge and billions of dollars.
The primary issue is that the world has passed by some Americans — economically, socially and morally — and in their hopelessness with ever catching up, they are looking to hurt everyone who they perceive has been elevated or elevated themselves above them.