Sure. He didn’t even know Campesi, did he? And he never had any dealings with associates of Trafficante.
Or are you saying that Marcello, Trafficante and the Campesis weren’t mob?
Knowing certain people doesn't make him a mob member. He knew far more Dallas police officers than he did mobsters. That doesn't make him a police officer either.
Ruby was not a mobster. He was not a member of any criminal organization. He was not right in the head.
Do you realize that when the Warren Commission interviewed him he believed that Jews were being killed in the jail basement? That he denied being part of any conspiracy, but was worried that people would take their anger out on the Jews because he was jewish?
Look at the details of the Oswald shooting. There is a trail of movements. There is no way Ruby could have planned it in advance. Read up on it.