This series is rather negative about clerics, which is, in my opinion, understandable. However, I do not buy the contention that many clerics are closet atheists. I suspect that many if not most clerics have bought religious nonsense hook line and sinker. Most clerics are probably not rational* enough to have spotted glaring scriptural discrepancies for what they are.
Nevertheless, I do believe that most televangelists are in it for money and power. They probably believe little of the nonsense that they sell to their generous flocks. VFX's recent bid for donations is a case in point.
* I mean free of cognitive dissonance and open to critical evaluation of their own beliefs and the basis for those beliefs.