So what's the right religion?

Technically France was first, when during the French Revolution there was a brief period of state atheism, and an attempt to re-purpose churches for the Cult of Reason, the deist Cult of the Supreme Being and such curious monstrosities. Fortunately, they died out with the more radical elements of the revolution - and because frankly, they were a bit silly.

It is a capital mistake that many atheists sadly make, to assume that one is rational simply because one is an atheist. Even if one is an atheist for rational reasons, this does not make one rational. Similarly, one can be a Christian for irrational reasons but still not be an irrational person. There's more to a person's reason than one's approach to this very specific topic.