I don't get it either. My whole family votes Trump - both my sisters, their husbands, and most of their now voting-age kids, as well as my parents (who are in their 80s, so they're gonna vote R no matter what). But they're all otherwise intelligent, college-educated, successful people. They just flat-out refuse, for whatever reason, to see what the rest of us see.
My oldest sister is the worst. She's full-on MAGA, and hangs around with like-minded people, belives in conspiracies, etc. It kills me. I've usually bitten my tongue, but she recently forwarded me Tucker Carlson's documentary on "what really happened on Jan. 6" (her words). I couldn't take it and finally lashed out, told her what I think of Tucker/Trump/MAGA. She asked me how I could support someone like Biden, who "sold our country out to China", Burisma, etc, etc. All the bullshit. I asked her how she could support someone who tried to overthrow an election and was found guilty of years of fraud and liable for rape. Her response? "IT'S ALL A WITCH HUNT!"... I give up. It makes me truly sad.