The same could be said for Russiagate, Hunter Bidens laptop, election fraud, Twitter files, etc. A few years ago, I would have agreed with you, but now........
And as to the Mafia theory? That's bs too. The Mafia would never have been able to handle the heat that would have come down on them. And the notion that it was revenge on JFK because his brother had taken on the Mob?
Why would you kill the brother of the man who is investigating you?
No. Oswald was a troubled and angry loner who wanted to be somebody.
Think of it this way: The Holocaust. History's most heinous crime committed by history's most heinous criminals, the Nazis, pug uglies in snappy uniforms. The mind can accept this. But the assassination of a popular, youthful and handsome president killed by a man so common, so low as to be invisible? The mind can't accept that so there has to be a vast and complex conspiracy.