Have you ever heard someone say, “If grew up in the United States, then that’s what explains my Christianity”?
Or, “If I grew up in Saudi Arabia, guess what? I wouldn’t be a Christian; I’d be a Muslim.”
If someone wants to use this as an objection to Christianity or religious belief, it actually commits a genetic fallacy. A genetic fallacy faults an idea based on its origin (where it comes from) and then dismisses it irrationally.
Think about this claim: “If you would have grown up here, you would have been something else.” That’s not a rational claim, that’s a claim of sociology. It’s an assessment of society’s influence on your beliefs. Sociology can tell us about the influences on our beliefs, but it can’t tell us whether those beliefs are true or false. So, this is not a strong objection to Christianity.