Why do Christians become Christians?

[drfuzzy]

Yes, of course they have. As an example, Billy Graham has spoken to millions of people in large events specifically designed to reach unbelievers. They respond to the message by the thousands--many with discussions and conversions on the spot. People who do profess or who are interested in learning more are assigned to a local church for followup.

Conversion experiences like this have more to do with the nature of human psychology than the message being promoted.  The great tent revivals preached a far less 'friendly' message than contemporary revivals do, but the atmosphere was the same.  Hysteria and group think are not good reasons to adopt any belief.

Not only that, but have you ever been in a "meeting" where there was a Billy Graham type "altar call"?  I have - thousands of times.  The peer pressure is intense.  I have been in churches with a youth group where most of the group invited "non member" friends.  These kids were actually gathering around the newbies, saying "you know you want to", and "you can feel it, I can see it in your eyes".  I have been in churches where nearly everyone in the building ended up on their knees at the altar, because the preacher was saying "surely everyone here has failed god this week in some way" - and everyone starts staring at the people around them.  Peer pressure, groupthink, hysteria.