So you suspect Israel killed Kennedy?
I am certain the CIA did the deed—with Israel’s active support.
I think Mossad and Operation Mockingbird used blackmail and infiltration to hold and maintain the coverup including mass media.
The details of the CIA’s involvement (on the ground logistic details) are covered in this book:
https://www.amazon.com/Bond-Secrecy-Watergate-Conspirator-Howard/dp/1936296837