Venus,
I do not advocate beliefs or faith in deities.
I don't subscribe value to mentally assenting to any concept, as if making a claim to a creed, declaring faith in a doctrine, or exercising credulity have value.
The love of my life was an atheist. (She is gone now.) Her family is entirely composed of atheists. Like the Cambridge Study, none of them, including my wife, became atheists due to religion. They never belonged to one. Their parents never did either.
I'm Jewish. Many practicing Jews are atheist and agnostic. My own dealings with the monotheistic concept of my people is not one of belief, definite not in Christian terms. In fact, Judaism itself is not a religion of beliefs. It is something you practice.
The point of the study is that history shows that humanity has always been intelligent enough to live without a belief in gods. Ancient historical data proves this. Not everyone in history who was an atheist did so due to examining religion. The study suggests that many people just applied their innate logic from the start and found no need to look further and examine religion as well. My beloved never gave a passing thought to religion and was still firm in her convictions all her life.
If you have a different view, that is fine. Jews don't proselytize. We aren't concerned with what you believe or don't believe. We aren't interested in converting people into theists, nor do we have concepts like Christians such as if you don't believe in God that you are doomed. We don't have an original sin concept, no need to be saved or save others.
I personally don't care what you do or do not mentally assent to. I value people not on their beliefs (which are just mental concepts) but due to who they are, how they act, etc.
I don't know why you are arguing against my personal conviction on this: Atheism exists because some people choose logic over superstition; atheism is not dependent on the existence of religion and rejecting it. Some people do become atheists by rejecting religion, but not everyone does.