Everything truly pertinent was available when Pricilla McMillan wrote Marina and Lee, the defintive explanation of why Kennedy was shot, in the mid-1970's.
The Democrats don't want to acknowledge the truth, that Communist Oswald, fresh from the Cuban Embassy in Mexico City, shot Kennedy for being anti-communist. For to do so would requiring acknowledging that the Communist threat was more than real.
And some Republicans here don't want to acknowledge the truth, that the martyred Democratic President died for a conservative cause.
Were you an adult when Kennedy was president? By today's standards Kennedy was anti-communist. As a liberal he was critical of the conservatives' hard-line against the USSR but he was certainly an America-first patriot as were most liberals in those days. But in general they viewed communism as a threat but a threat that could be brought around without war.
Do you really believe Kennedy was a match for Khrushchev? James Reston, Washington bureau chief and columnist for the New York Times was the first man to talk to Kennedy after the president's last meeting with Khrushchev. The meeting came at the request of Kennedy after the regular scheduled meetings in Vienna in June, 1961 had ended. Things went so badly for Kennedy he wanted to talk to Khrushchev alone (w/interpretors only).
Here is from a book by John F. Stacks "How was it?" Reston asked casually.
"Worst thing in my life. He savaged me," Kennedy responded. The president seemed to Reston to be almost in shock, repeating himself and speaking with astonishing candor to the journalist. "Not the usual bullshit," Reston wrote in his notepad. "There is a look a man has when he has to tell the truth." Kennedy went on to say that to counter the battering by Khrushchev, which he attributed to the Soviet leader's underestimation of Kennedy's resolve, the United States would have to stand more firmly against the Soviets' demands in Berlin and against the mounting Communist insurgency in South Vietnam. Reston wrote later that he was "speechless" when Kennedy mentioned Vietnam, since that troubled country was at that point nowhere near the heart of the Cold War conflict and, in Reston's estimation, did not carry much weight in the superpower tug-of-war. Ever afterward, Kennedy's remark to Reston was seen by historians and by Reston himself as the moment marking the beginning of America's long slide into the tragedy of Vietnam.
Kennedy was rich, likable, telegenic, good with "the usual bullshit," and bright but as a president he was virtually zilch. What did he ever accomplish? Do you know what we gave up to keep the USSR from putting missiles in Cuba?
It was clear then and now confirmed I believe that JFK / RFK were dumping LBJ. That opened LBJ to criminal prosecution for his and little Lyndon's (Bobby Baker) crimes. And Baker was only the surface.