Re Kennedy. CIA being involved was an actual Russian conspiracy theory. Though they are a reasonable suspect given JFK wanted to defund them after the Bay of Pigs debacle.
The recent JACKIE movie has her blaming the murder on right wingers.
As for 9/11, HALF of Democrats believe Bush knew beforehand.
So that’s hardly a surprising position:
When did I mention the CIA?
Hitlery Rotten Clinton took to the floor of the Senate in February 2002 to declare that “Bush Knew!”