Herr Bonnenspurssen could only attack someone like John McCain after he was dead.
I've sometimes wished I could get a 30-second peek into Trumpty-Dumpty's mind -- or Melania's (must be a lot of Stockholm Syndrome in there) -- but it would be like a really bad acid trip.
The worst thing about being a junior school teacher is the dark suspicion that not all of the creepy little monsters will grow up.
It's important to recognize that Trump and his ilk are not accidental. Read Ferdinand Lundberg, "The Rich and the Super Rich" (1960s) -- the chapter on US 'democracy' is subtitled "The Dullest and the Worst" [I wondered if that was a pun on "Dulles"]. The last thing the ruling class wants is competent people in government.

Or could it be that he is just a nasty small minded man who hates to see anyone other than himself being lauded as a national hero.

I'm sure dt's legacy is secure. It isn't a positive one, but nobody will be able to take it away from him.

It seems a good bit of his rancor toward McCain is the fact that when handed a copy of the infamous Steele Dossier, McCain turned it over to the FBI, as he should, rather than turning it over to Trump to help him destroy it or cover it up.

It's the "you're making me look bad, McCain!" syndrome...

He is an extremely and profoundly immoral person in every aspect of his life.

Psychopaths aren't insecure.IMO, Trump is a truly sick person.