Too many people have rebuilt their entire identity around the guy. It's just like people who get scammed and then keep giving money to the scammer even after you tell them what's going on. Admitting that they've been scammed would be a blow to the ego that they can't handle.

Combine that with a general inability to understand or empathize with what's going on outside what they can directly see. How many Trump supporters have we seen who loved him cracking down on illegal immigrants until the crackdown came for someone they cared about, then suddenly it was an outrage (but only an outrage in that specific case)? How many have cheered tariffs until they had to pay a bunch more money for something? How many said "no more wars!" and thought it was great how Trump didn't invade anyone in his first term, and now are saying that attacking Iran is great because they've been an existential threat for half a century? This will be the same way. It'll be, yeah, stick it to those foreign bastards. America First! Then in a few months or years, "The store doesn't have any routers, what the hell?"