I don't think I understand your reasoning here.
So if I understand you correctly, you believe Isreal facilitated the assanation of JFK so they could get a more favorable deal for nukes from LBJ correct?
Now, I joking brought up the Godfather (Because that essentially exactly what leads to the attempts on The Godfather's life) however I'm curious as to why you think that a US president would just ignore that Israel killed his predecesor and still be willing to deal with them.
In order for that scenario to go down, LBJ would have had to have been in on the attempt. Do you agree or disagree to that?