I've been reading a very interesting book that highlights, among other concepts, why people such as David Miller continue to hold on to beliefs long after they've been proved to be absurd--in fact, especially after they've been so proved. This, of course, includes irrational and frankly, ridiculous Trump-love.
It boils down to: no one likes to admit they were wrong--to such an extent, in fact, that continuing to make an absurd claim (such as: "Bigly Dear Leader won the election") is far more attractive than acknowledging that you were wrong. The continued shame of false belief is much less painful than the pain of honest introspection.
This is why con men are so successful, even in situations where you might think, "Well, nobody would fall for that." This is why, even after Trump botched the pandemic response and behaved like a petulant toddler during the debates, 75 million people still voted for him. If you listen to a con man, you become invested in him. The 75 million decided to double down on Trump rather than admit to themselves that they'd been played.
Of course, they still feel shame. And they react to that shame in different ways. For David, that consists of lashing out at anyone who points out his shame--calling them every name he can think of, and of course screaming LIAR LIAR LIAR LIAR LIAR at anyone who dares to disagree with him. What he doesn't seem to fathom is that responding "you too you too you too" is not a valid defense to an accusation.
I truly believe that he doesn't even fully realize how stupid this makes him seem. I say this in part because I know he's not stupid--he believes in a LOT of stupid, evil shit, but he's been conned, played, sold snake oil, manipulated; he dances on puppet strings. At this point, he has no more free will than a robot does.
So he deserves our pity. As do the millions of formerly decent, rational people who have been turned into Trumpers by the greatest and most successful con man of the century (so far, anyway!).
(He will be totally unable to resist responding to this post by insulting me and calling me a liar, even though his doing so will just prove my point.)