I really do not understand the mentality of that man.
Me, neither, but he's the most predictable person I know of. He's extremely simple. He wants attention, praise, power, wealth, and unilateral loyalty, and his only response to anything he doesn't like is to insult and seek revenge. He feels entitled. He has no human qualities. He has no wit (never clever). He has no empathy and is never kind. He's a bigot. he envies dictators that imprison the press and poison enemies. He has no love of animals or art, loves no human other than himself being including his wife and children, and constantly lies and cheats others.
His reaction is totally predictable: conspiracy, witch hunt, Democratic conspiracy, partisan politics, whataboutism, rapidly evolving excuses, and calls for violence.
But like you, I also don't understand what makes a person that way.