That is a great question. Thank you for that P.C. I doubt conversion is from "on-fire believers" of various groups. Like you said, those that are not active but had some background in religious training (going to church, hearing Bible stories, etc.) are the ones that (I would guess) are the ones that are talked to about another belief. Their desire to have a transcendent being to fill the vacuum in their life tend to leach on to a belief. They have emotional reasoning to confirm "this is true" and they fall in line with the teachings. Only a hypothesis though... I guess I left God and Satan out of this picture though... Maybe God really does reach out to people and have them change and then again, maybe Satan does pull people away and lead them on the wrong path. Then again, both might be fighting for human souls and it is up to the person to seek truth about God and make a decision. But then again...