If you have to choose between being being ashamed of yourself or thinking Justin Trudeau is going to hell for dairy-related reasons, the latter option is far superior on grounds of psychic comfort. (Exception: you yourself are Justin Trudeau.)
But it adds up. I don’t just mean: you get wronger and wronger. It gets harder and harder to doubt the next ridiculous thing – since admitting Trump said or did one thing that was not just wrong but ridiculous would make it highly credible that he has done or said other ridiculous things. But that would raise the likelihood that you, a Trump supporter, have already believed or praised not just mistaken but flat-out ridiculous things, which would be an annoying thing to have to admit. So the comfortable option is to buy it all – the more so, the more ridiculous it threatens to be.
There is nothing uniquely Trumpian about epistemic over-investment. But Trump does seem to have a Too Big To Fail talent for locking folks in, by deliberately getting them deeper and deeper in epistemic hock.
This is exactly the reason that “You’ve been conned” will never work with Trump supporters.