^^^ Heh - yes, it was largely a Cult of Baltar, as you say, but by that time he was starting to have some epiphanies of his own about the One True God, thanks largely to Head Six and her ability to manipulate cause and effect to lead him in to believing he was a pure instrument of God teaching His Word. That was the cool thing about his "fireside chats" - you never really knew if he was genuinely pious or if he was still being driven by historical narcissistic bent. Whatever he believed, though, his followers had definitely drank the Koolaide.
I think once they found Earth 2, though, he seemed to have been genuinely humbled by the whole experience.