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?
Yes, a few dozen, exclusively through my writing.
My impression is that the arguments have almost no effect. What has an effect is being smart, likable, and altruistic, while occasionally mocking religion and sending signals that being religious is socially uncool.
In other words, people will only convert for precisely the wrong reasons.