Kennedy and Theories

Oswald was not capable of such violence; he could not have made the shots in the time allotted; the rifle was inferior and the scope was misaligned; he had an alibi; there is no record of his interrogation by the Dallas police; he was an imposter from Russia; the "Oswald" in Mexico City was an imposter;  his pictures holding the rifle with the pistol and the two Communist newspapers are fakes; he traveled with Cuban revolutionaries; the rifle found on the depository sixth floor was a Mauser, not Oswald's Italian infantry rifle Model 1891/1938; the third shot--the head shot--came from the front; a second shooter was seen on the "grassy knoll;" the Dallas doctors disagreed with the Bethesda pathologists; three tramps in a box car in Dallas were likely CIA and were probably involve--one even looked like Woody Harrelson's father; Tippit's murderer was unidentified; the bullets that killed Tippit did not match Oswald's pistol; many involved have died suspiciously; the Mafia did it because of their annimosity to Bobby Kennedy; the CIA did it because of their fear of a Kennedy retaliation over the Bay of Pigs invasion; the Garrison argument implicating Clay Shaw (on the evidence of a psychotic who failed a lie detector test); Castro did it in self defense; the JFK movie by Stone (see Garrison); the Navy pathologist burned his notes; the Dallas FBI burned a note Oswald left for them before the murder; Marina Oswald burnt photographs of Lee holding the rifle, Ruby killed Tippit, Tippit was meeting Oswald and was involved, .....on and on.
So it goes in the democracy of ideas; everyone is entitled to a viewpoint. But an opinion is different from a thesis and very far away from a conclusion.