Interesting how Oswald was murdered. And then the murderer conveniently died of cancer soon after. Also interesting how that plot has been made out to be this big mystery with every which way being considered, except for an internal job. The patterns are getting pretty clear now
Every which way is considered because that's what humans do. Everyone wants to be the guy who came up with an original theory to show how clever they are.
Your vague “internal job” accusation is no exception to this.