I have an anecdote, but my situation is probably not representative. I started out as an evolution-accepting theist who didn't belong to an organized church. I'm pretty sure I believed instead of belief in belief, but since my beliefs didn't match those of any organized religion, I didn't have a community of other believers around me.
I was converted to atheism by watching atheist youtube videos, to which I was introduced by a series mocking creationists. When I realized that the smartest, most science-savvy commentators were atheists offering good arguments for atheism, I converted over a period of a month or two. The key arguments for me were that my personal religious experiences were understood to be my own brain and not necessarily God, and that the burden of proof was on theists.
I'm pretty sure I believed instead of belief in belief, but since my beliefs didn't match those of any organized religion, I didn't have a community of other believers around me.
I've encountered a lot of theists whose beliefs didn't match those of any organized religion. They tend to assume their religious outlook is exceptional or unusual (when I first started seriously investigating people's religious beliefs, it astonished me how little real communication most people have about their beliefs with people outside a very small circle,) but they tend to ...
Have you ever convinced a religious person to become atheistic? How did you do this? How long did it take? Were the people in some sort of life crisis, or were they just living along?
This is probably a quite difficult task of persuasion. So stories how people were successful at it could be very interesting to improve ones' persuasion abilities.
Relatedly, it might be interesting to know what religious groups have gathered on techniques to convert people to their religion - are there some manuals/techniques floating around?