1. Greer acted contrary to his training as a veteran driver of the presidents limo.I disagree entirely. You presented nothing but a catalogue of your private suspicions clustered about the idea that Greer was from a Protestant Irish background and JFK from an Catholic Irish one, combined with the suggestion that Greer as driver intended to expose JFK to gunfire (a begged question). There's nothing "compelling" about what you offered. Your knowledge of the JFK assassination literature is too thin, and your grasp of logic and sound argumentation too poor, to support any compelling claims here.
2. He did not obey orders from his superior to step on it, instead he continued decellerating the limo looking straight att JFK until he saw his head explode. THEN he turned around and sped away.
3. He knew how he had acted during the shooting, but lied about it to the Commission.
4. There were newly painted yellow markings on the south curb of Elm Street, exactly where the shooting took place.
This is suspect behavior, but what motive could he have for taking part in a conspiracy?
1. He was an Irish protestant and JFK born into an Irish catholic family with centuries of hatred between the two ethnic groups.
2. Greers son, Richard, insinuated that his father did not like JFK beacouce said ethnicity.
3. To work as a chauffeur, a servant to the ’enemy’ and to a member of a people colonized by the Brittish for 800 years is a so called status reversal, differcult to handle for anyone.
4. The agent who was scheduled to drive the limo in Dallas died mysteriously on duty in Camp David a couple of weeks before the planned visit in the city.
Of course this is not proof of Greer was part of a conspiracy, but it is suspicius and a plausible scenario.
IF one belive that it was a conspiracy behind the assassination, they had to be sure they succeeded. A surviving president would have rounded them up and put them away for good.
A driver who decellerated the limo until the president was deadly wounded could provide that security.
I believe Greer was that driver.