I had a friend in college back in the '80s who was a born-again Christian and a big Jim and Tammy Faye Baker supporter. After their scams and shenanigans had been publicly exposed. And it wasn't even that he didn't believe the news about them -- he did believe they were scammers and kept sending them most of what little money he had. If you want me to explain that mindset, I absolutely can't. It's something along the lines of "God works through disreputable people sometimes".
For me, what's so mysterious is not that people like this can be cheated out of their money. It's that people like this have any money to begin with.
My fear is that when he dies, they'll just replace him with a body double. My even bigger fear is that they've already done that.