Ruby’s public statement was that he killed Oswald to avenge Jackie.
Ruby also made it clear he was convinced that LBJ would pardon him. Somebody must have told him that.
His private statement (to his rabbi) was that he did it for the Jewish people.
All data points—you can make of them what you will.
No doubt there is a lot of wierdness here with Ruby. But I have to believe that if the grand LBJ-Deep State conspiracy was true, Ruby would have quickly been Epsteined.