Mostly good, but I don’t think that is what is meant by “Who shot John”.
That is a very old expression.
https://en.wiktionary.org/wiki/who_shot_John
And wouldn’t Nixon have said “Jack” or “Kennedy”? If he was being familiar enough to call Kennedy by his first name, I would think Jack would have been the first choice.
Conspiracy theories are silly fun. But I imagine when the power players actually stage an event, it won’t be obvious to keyboard warriors with an internet hook up, and anyone in the know who blabbed wouldn’t be allowed to resign, they’d have a sudden heart attack or conveniently fall out a high window.
If you can figure out a conspiracy just by “research” online, then it’s probably nonsense. If you’re right, then why would “they” let you continue talking about it?