There is overwhelming evidence that JFK was murdered because he had become a liability for the global elite who placed him into power. In particular, he intended to end covert activities in Vietnam, splinter the CIA, and abolish the Federal Reserve System.
The following video covers just a small fraction of the evidence that he was not killed by a lone gunman, but was taken out by a hit squad working for agencies of the US government.
"We are opposed around the world by a monolithic and ruthless conspiracy." - JFK