I grew up in a smallish city in the US South. Culturally, in those days, "everyone" was religious. It was a quiet religiosity and not "evangelical". We went to the Methodist church. I was never a "believer". I had to go to Sunday School until I was about 15.
As a child I suppose you could use the word "believer" to include anything. When I was 4 and I was being read a story about Aladdin and his flying carpet, or a story about Santa or stories from the Children's Bible, I took them all in. I learned all the children's biblical stories.
Beyond that age, when I realized that there was no flying carpet, I also understood that the religious tales were also not true.
I never had any bad experience while at church (mainly Sunday School). These were the same people I went to school with and for many parents, there was a bonding socially with the people they knew from Church.
At 13, after the first "class" leading to Communion I told my mother that I wouldn't be participating in that. I could realize the "cult like" nature by that point and she said fine, I must be too young. At age 15, I said that I didn't want to go to Sunday School anymore (after trying that unsuccessfully a year earlier) she said, I guess this isn't something that you can force anyone to do and maybe you'll take it up after college, and she said I could quit going.
That's it for me. There was no "losing" of my religion. I never was religious. In those days it would have been "rude" to use terms like atheist but if anyone had been nosey enough to ask me about religion I would have just said "I'm not religious" and left it at that unless they pressed.
I never heard religion mentioned among my peers throughout high school and college. I now live in Seattle, there are churches here but I don't know anyone who goes to them or who considers themselves to be religious.
In other parts of the country it would be different of course. As a kid, I understood the calmness of the chapel with the music, tall ceilings, stained glass windows. I understood that it was OK to take part of a day to reflect, be part of a community that would trying to do good things, etc. It's good to get outside of yourself. You don't need church for that or to concoct a God and all the mythology that goes with that, IMO.
I get that some people get more out of that than I do. It doesn't rub everyone the wrong way. I've very independent in general and in my thinking. I was almost immune to peer pressure as a teen so this wasn't for me at all but for those who can get past that and can embrace the "tradition", I get it.
I've also had a comparative religions course in summer school in college and I have briefly read both the OT and the NT, so I'm not unaware of the Bible nor of other religions. I'm aware of Marxism yet I'm not a "believer"
