All a reasonable man can say 52 years after the event is that the government report is apparently not true. How it's not true, or what is true, i.e., who killed Kennedy, is not available.
Kennedy is now a martyred hero. IMNVHO, his Presidency does not justify this.
Oswald was told he was "hot" and had to drop out of sight for a little while before Dealey Plaza, and was sent to Mexico City. One of the so-called Oswald lookalikes was seen in proximity to Oswald, because he was shadowing him, in order to become familiar with him, to be able to recognize him immediately and from a distance. That lookalike's photos showed up in the Warren report, and were taken (like some of Oswald) as he left the Soviet embassy; he can be seen checking his wallet and other effects after they were returned to him.
On November 22, 1963, the "lookalike" shot JFK from the County Records Building, and waited for a short time to shoot Oswald, who was standing in the window as he'd been told to do, having shot and missed (again, as he'd been told to do). Thanks to the acoustics of the Plaza, the shots from Oswald's gun didn't sound like they had come from his direction; the police ran up the Grassy Knoll and found no one and nothing, smelled nothing, and didn't spot Oswald and open fire as expected. Once they'd opened fire, the real assassin was to shoot Oswald fatally, leaving the mourning nation with a horrendous crime and dead perp, all tied up in a bow. Instead, the assassin had to pack up and limp his way out of the crime scene, his disassembled rifle taped to his leg and concealed under his pants. *