Has anyone discovered a successful way to make religious people atheist?

[robvalue]

Building on that, I find the "Socratic method" to be excellent.

You ask a serious of questions, which are carefully chosen to make the person really think about the subject. It may well be that they have never stopped and really analysed things before.

You can gently lead someone to more rational explanations, by encouraging them to do the thinking along the way, so that they reach the conclusion.

I used it a lot when I used to teach maths (I didn't realize that's what it was called at the time). Instead of me just telling the person how to do all the bits they don't understand, I work through it with them. It also highlights exactly where errors in thinking are occurring, so you can focus your efforts.

With a theist, I usually start with, "What is God?"

The audible gears cranking show me that they have probably never been asked this before.