@aidan,
aiden, As I've stated often, religion is an accident of birth. If we can accept this as a general rule, most of us would know that in the US, over 80% consider themselves christians. That's also true of most cultures of this world; one can almost guess what religion are practiced in Europe, Asia, South America, or the Middle East. There's a practical reason for that; most follow the religion of their parents.
I have also noticed that the individuals on a2k who have claimed they were atheists came from families that believed in one religion or another. Many of the atheists I have personally met also came from religious families including your's truly.
I have a Jewish friend who believes in atheism (or no theism). I have also met a Jewish doctor on a flight from Chicago to San Jose some decades ago who is Buddhist. I mention this only because calling oneself an atheist has no clear definition.
Whether one's culture is fundamentally Buddhist, Christian, Jewish, Muslim, or any combination, most believe in the religion of their families and friends.