Israel wanted nukes but JFK said no.
...Kennedy’s fate was sealed in June 1963 when he authorized the issuance of more than $4 billion in United States Notes by his Treasury Department in an attempt to circumvent the high interest rate usury of the Eight Families Federal Reserve international banker crowd. President Lincoln had made a similar move 100 years earlier and suffered the same consequences.
The wife of accused assassin Lee Harvey Oswald, who was conveniently gunned down by Jack Ruby before Ruby quickly died in prison, told author A. J. Weberman in 1994, “The answer to the Kennedy assassination is with the Federal Reserve Bank. Don’t underestimate that. It’s wrong to blame it on Angleton and the CIA per se only. This is only one finger on the same hand. The people who supply the money are above the CIA”.
[source : Who Killed JFK?, Original Dialogue, http://originaldialogue.blogspot.co.uk/2012/10/jfk-assasination-greatest-murder.html, 16th August 2011]