Why do some people think someone turns into a non-believer because of society?

Isn't it really the opposite? A baby is born innocent without any religious beliefs whatsoever. So a baby would be born without a religion.

So literally you're born non-believer because religion hasn't been taught to you yet. Then as soon as people start baptizing their babies and enforcing religion on them during their developmental years, then you become believers.

Why do some people think someone turns into a non-believer because of society?
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