Baloney...Kennedy was killed by a conspiracy led by Johnson and Hoover. If you take a little time to read...and not buy elite media propaganda like Posner's book, and Jennings' flacking for the discredited Warren Report you'd lean a few things.
It's a free country, you can believe what you like, and your belief doesn't have to be based on facts.
However, the facts of this event demonstrate that all of the shots that struck the limo and its occupants were fired from about the location of the book depository window.
That doesn't mean there wasn't a conspiracy involved. Since Oswald was killed, we obviously don't have his account.
The shooting of Oswald by a nightclub owner with mob ties is extremely suspicious. But Ruby died without giving any specifics.
So there may well have been a conspiracy to use Oswald as the instrument to kill Kennedy.
But the "grassy knoll" gunman is just a fantasy used to sell books and movies.