The President and the first lady travelling in an open top car seems inconceivable but was that common back then?
You have to admire the Deep State of those days in their ability to construct a web of 'alternative' bad guys in and around the plot to kill JFK such that years later many believe that it was the 'Mob' or "Jimmy Hoffa" or the 'Cubans' who killed JFK and 'Israel' is way way down on the list of suspects normally touted by sensationalist press.@ Caduceus
I read the book 'Final Judgement: The Missing Link in the JFK Assassination' by Michael Collins Piper.
According to this book the murder was probably committed by right-wing French gunmen with major support from the Israelis. The French and the Israeli's were strong allies until Charles De Gaulle came to power. The French even helped the Israelis to get their nuclear program up and running. The French right-wing (OAS) despised JFK because he supported Algerian independence. They also tried to kill De Gaulle because in 1962 he agreed to a French withdrawal from Algeria. Fredrick Forsyth (who worked for British Intelligence) wrote the famous book 'The Day of the Jackal' based on this attempted assassination. In this book a sniper tries to shoot De Gaulle - sound familiar?
The Israelis also hated JFK for a variety of reasons 1) His father, Joe Kennedy, was perceived to be an anti-Semite who tried to keep the United States out of the second world war (he was the US ambassador to Great Britain). 2). Most importantly - JFK opposed the Israeli nuclear program. 3) JFK also supported Algerian independence and the Israelis didn't want to see nationalism spreading throughout the Arab / Muslim world. Lee Harvey Oswald was the 'patsy' who was conveniently silenced by Jack Ruby (real name Jacob Rubenstein). Jack Ruby was a gangster and was connected to (((Meyer Lansky))) who was the REAL godfather of organised crime in the United States.
Taking out JFK was a 'win-win' for the Israelis and the French right wing!