Well Shatner is an actor - a professional liar you could say.
But it is an interesting way to look at it. We all know the globe model works and fits observational evidence but Nuke denies it/can't understand it. I accept that. We have some insight into what he thinks the world is like and that doesn't work with either reality or the reasons he give for the globe not working. We need to accept that in 100 more pages from now, that is not going to change.
But, what about the individuals behind the "lie" (if there is one)? It is easy to whitewash things and just say "governments or the scientists"? But who really are the people? Who is specifically telling lies to put forward this myth, and why?
Shatner is a good a place as any to start. Liar or somehow tricked?