What exactly is it that causes the dopamine release in the brain for some people at a church revival?

I think certain settings trigger emotional responses. Its similar to the way people in groups at rock concerts or soccer games get into an emotional frenzy. Look at videos of young girls weeping and tearing at their clothes while watching the Beatles or Elvis. This is not the holy spirit at work but the response is similar. They work themselves up over an icon into an emotional release. Yes, religious experiences have been duplicated through electrical stimulation of the brain.