[olavk]

In order to decide whether you believe in something, you have to know what "something" the question is about. The concept of "God" in western society is often so vague it is impossible to have an opinion either way - for some it means "the absolute", for some it means "the force of creation in the universe". I don't think you can meaningfully say you don't believe in such unspecific concepts. But if you go into more concrete religious beliefs, like "God created the world in seven days" or "God punished the wife of Lot by turning her into a pillar of salt" or "Jesus is the only path to God", then it is easier to decide whether or not you actually believe it or not.

My impression is Biblical literalism is more widespread in the US compared to Europe, which in turn is easier to decide for or against. Especially the discussion about evolution vs religion is almost entirely absent in Europe. Framing evolution as opposed to a belief in God means it is pretty easy to become an atheist, since we have overwhelming evidence for evolution.