It’s really not hard. They’re older people (boomers/gen X) who think things were better 40-50 years ago (e.g. without all those pesky minorities in positions of power) and want the arm of the state to do it. They reject progress, both social and scientific, because they have no concept that things get better over time.
Just gotta let them take the mask off. A few posters here have already gone full-bore “I want black folks out of my country.”