Tell it to John Hinkley, Arthur Bremer and Squeaky Froamme. All failed attempts with a pistol. A rifle can be deadly effective. Provide us your "supporting evidence" that validates your claim that "it is infinitely more difficult for a single person to kill with a rifle than up close with a pistol." Start with the example of Charles Whitman who hit moving human targets at distances of three times the JFK assassination with similar USMC training to Oswald. And don't forget James Earl Ray.
Thanks for proving my point. NONE of them attempted their shootings with a rifle. Not even when it was claimed that LHO was successful with a rifle.
I used to have this same debate with Dave Von Pein. Seems like old times.