Why can't we just get an answer? I have been at this for 2 days and nothing is working. I have hit them with the "two special powers" in one sequence after another and all I get is the glow, they never convert. Yes, I wait an hour or two between zaps. It seems like we just can't get an answer just some cryptic clue. I thought that was what the spoiler alerts and boxes were for, in case you DON'T want to know.
If you're getting the "glow" then it's working.
Pay attention to their Faith meter. You will notice it moving more towards the right side of the meter each time a villager "explains the truth". They have to be out of the red zone.
I run my game on Fast speed.
I sincerely hopes this helps to alleviate some of your frustration.