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

[Mudhammam]

Yeah. I see education as the best "weapon" against all form of irrationality. Good, quality, reality/evidence based education. It's a peaceful and painless way to chip away at all absurd and harmful notions, over many generations.

I'm not suggesting other approaches aren't sometimes needed, especially in extreme situations, but I think this should be the underlying strategy.

You nailed it. Education. That is why I will gladly say, "What Jesus is to the Christians, what Muhammad is to the Muslims, Socrates is to me." The simple reason is Socrates' ironic attitude that: "I know one thing: that I know nothing." And as Francis Bacon (who died 390 years ago today) would argue, rightly, in the text every believer and unbeliever who cares about education owes themselves to read--I mean The Advancement of Learning--wonder is the seed of knowledge.