beancounter
(I/Me/Mine)
I have seen a lot of people reverse theological belief or non-belief in a philosophy class by being exposed to all the arguments for an against something. People who believed in God, no longer doing so, people who didn't believe in God, believing in God (or becoming more theistic). I think people are a lot more likely to change their mind if the arguments are simply presented in that way (what I think people resist is the sense that someone is asking them to join in their way of thinking).
I'm not so sure of that. Belief is often tied to feelings of tradition, belonging, fear, peer pressure, etc. In addition, these are concepts that people are introduced to at a formative age, resulting in such beliefs being "hard coded" into their world view. A well reasoned argument is unlikely to change a persons religious belief (or lack thereof).
I'm talking in vague generalities here, because going deeper is bound to get people upset. As the saying goes, avoid talking about religion, politics and UFOs.