Lyndon B. Johnson was overshadowed by JFK during the entire presidential term. He was bored in his new position as vice president and wished to go back to his old job as a Texas senator. Feelings of dissatisfaction and disagreement could have led to Johnson assassinating Kennedy. Johnson had numerous motives to seek revenge against Kennedy, all involving politics. In 1960, Kennedy took the democratic nomination from Johnson and was considering dropping him from the ballot in the upcoming election. Because of JFK's popularity, Johnson was not able to become president. By assassinating Kennedy, he was able to become president right away.
There is no evidence that proves Lyndon B. Johnson disliked Kennedy or had made plans to assassinate him. His immediate creation of the Warren Commission proves he was motivated to begin an investigation to find out who killed JFK. To accuse LBJ of assassinating Kennedy is absurd, especially in his role as vice president.
[P1] Lyndon B. Johnson was bored as vice president. [P2] Kennedy made political moves against Johnson. [P3] Therefore, Lyndon B. Johnson had reasons to assassinate Kennedy.
Rejecting the premises
[Rejecting P3] There is no evidence that supports this theory.