Oswald was not trained as a "sharpshooter". When training for shooting Marines have their recruits shoot under ideal conditions. If you can barely hit anything you are given a "Marksmen" badge. If you hit a few more then you get "Sharpshooter". People that actually are good shooters are given the "Expert" ranking. Oswald got Sharpshooter and that was reduced to Marksmen after a second test. He was not trained to shoot and he was a poor shot. In fact while in the Marines he was court-martialed for accidentally shooting himself in the elbow with a .22 handgun.

The second part of the paragraph is also nonsense. Jimmy Hoffa, who was the country's premier labor leader and presidents had his number on their phone lists, disappeared. No one knows exactly what happened or who did it. Or where he ended up. That was a pretty big conspiracy that no one was able to solve at the time or since. It does not stagger my mind that Oswald was the instrument of a conspiracy. Maybe it staggers the mind of the Rolling Stone writer.