I believe the Monarchist thinking was greatly amplified in many old liberals after his assassination. It came about as a result of never having quenched the thirst of REVENGE for JFK’s murder. They won’t accept 9/11 because they were forced not to accept justice for JFK’s murder.
As long as these people live, they think it’s become their duty to seek out all those responsible for JFK.
This is becoming increasingly clear. They make movies, documentaries, TV, etc., because THEY CAN’T LET GO of it.
Remember Oliver Stone’s theatrical version? Look how many kids and young adults in 1991 took Stones movie as fact.