After a violation of the Budapest memorandum, why would the Ukrainians ever trust the Russians and US?

Excellent lesson. Too bad Trump is a horrible student. We all knew something was going to happen, but I'm sure he thought (hoped?) it would go the way of Kent State or My Lai and he didn't care. Trump is a "might makes right" kind of ignorant thug.

A viable plot in my opinion would take place at Mar-A-Lago or Bedminster or the actual entrance to the White House. No this was something else. The only political thing I can attach to this is the risk that his wife and 5 children and himself would be deported to where they would all be killed.

yes. Panic and desperation are strong motivators for irrational actions.
Fox is trying to spin this, as usual, as a Liberal plot.

Fair enough, but I think he was in DC to contact someone who could help him and his family not get deported, and panicked. Afghan interpreters are still being hunted by agents of the Taliban "The reason for the gun" armed NG look like ICE agents walking towards him from around a blind corner.

Perhaps. It could be easily explained by "I can't take any more of this, I'm going to go kill the president."