TOS Season 2, Episode 43, "Bread And Circuses." The entire final scene. I can't believe this wasn't mentioned on the first page of this thread. Upon figuring out that the inhabitants were just learning about jesus, Kirk says something like, "Wouldn't it be great? To see it all over again from the beginning? To be a part of it?" Be part of what? The Crusades? Inquisition? Witchcraft trials? The Dark Ages? Countless documented cases of child molestion? I want to reach through the screen and slap him every time. It's the worst dialogue in ST, objectively and without a doubt in my mind.
Coon probably wasn't the worst writer overall to work on Star Trek, but no one else I can think of just actively tried to enforce the idea that Starfleet was a christian organisation. Makes me sick.
I guess I apologize to anyone reading who might worship a sexist, racist, homophobic, genocidal child killer of a god whose favorite people are pimping mass murderers who commit war crimes.