Prior to reading that, I had decided to interpret the communists and the narration as both being right about movies, with the film trying and mostly failing to effectively pull off the bait and switch: they are a tool of the capitalist oppressors and they are also a truth made of light that is beyond words. But of course, as the rabbi says, the Nazarene was just some guy.

I think the film may retain that idea regardless of interpretation; there's no other way to make sense of the film's ending otherwise, or the embedded roundtable on the nature of the divine (to which the credits call back with the closing disclaimer "This motion picture contains no visual depiction of the godhead"). Just the degree to which we are meant to take it seriously or cynically is what shifts.

Do you recommend Burn After Reading? It looked like an idiot plot, so I avoided it.