My answer: 1) Trump lied and Fox News propagandized, so much so that even union workers thought immigrants might take their jobs and people prone to following a leader without thinking about what the leader wants them to do really came to believe in a benevolent dictator. 2) Biden had a really bad night when he debated Trump, and his stuttering, which isn't very important when work is getting done but is very important in debates, prevented him from saying much. 3) Education is so poor in this country, with many schools offering no relevant history and no civics at all, that people who should know better thought that a president was a king and could by himself lower the price of groceries and gas.

I think that does it. Do you have anything to add?