If not for Kennedy being killed in Dallas, Johnson was within a few days of public exposure as corrupt by Life magazine, with removal from the ticket and prosecution to follow.
The governmental conspirators regarded Kennedy as a severe menace to national security due to his weakness against Soviet Russia, failure to back the Bay of Pigs invasion, and seamy private life that made him vulnerable to blackmail and compromise.
LBJ was involved up to his neck—but the reason your explanation is incomplete is that it does not explain why the mass media is still covering up this story sixty years later.
That is critical to understanding the assassination—without a massive coverup a lot of folks would have been wearing orange jumpsuits.
“likely that Lyndon Johnson arranged for Kennedy to be killed, through a wide-ranging conspiracy involving the Mafia, the CIA, the military, Cuban exiles, hired assassins, and the FBI — with funding by Texas oil interests.”
Does “funding by Texas oil interests” include the Bush family, or was that before they moved their operation to Texas?
Whether connected to oil or not, I still believe that Bush 41 had his fingers in this assassination via his CIA involvement.
Some have speculated that those same Cubans are seen in photos from Dallas (the three bums by the railroad tracks iirc). Haldeman(?) in his memoirs thinks Nixon may have been alluding to the JFK assassination.