Sokath, his eyes uncovered!
Trump didn't make these voters, he appealed to their extant habits and attitudes. His core voter base, his cult: they were ALWAYS the kind of people to think they knew more, and were always right even when the evidence was there telling them they were wrong. Trump just coopted it, and made it about HIM. He drew in a good number of folks who could be made to think critically, not because he offered them anything, but because he took over the republican party. But some of the ones still capable of critical thought have walked away, probably more than I'm giving credit for.
Even some government agencies have admitted that it's a cult, and you can't ask them to leave it, you have to deprogram them.