My father is an atheist, as far as I am concerned, but he calls himself an agnostic because he can't prove with complete certainty that God does not exist. I can think back on a few times when he mentioned that nobody really knows if God exists when I was about seven years old, but I just thought that meant nobody has ever met God. The upcoming years of my religious indoctrination distanced me from what my father said those few times. He did not reveal his lack of belief to me or even express a single word about what he thought about religion again until I was a teenager, which was after years and years of immersion in a religious culture and religious parts of my family. When I was fifteen, he blind-sided me out of the blue and tried to make me feel like a foolish retard for being a Christian. It was pretty shocking. However, my mother and my grandparents brought me up to be a Christian. That is the main reason why I was one until I was sixteen. My mother never forced me to go to Sunday school and church, but she taught me that it was the thing to do. She took me pretty much every Sunday for years. My grandparents were Presbyterian missionaries who were big time religious, and they took me to their church and sunday school every chance they got. They took me to Bible school at their church a whole bunch and gave a major effort at convincing me to go to their church's elementary school. I also grew up in Mississippi, so my teachers were pretty much all protestants who did not hesitate to throw their views at their students. My friends were Christians when we were kids, so I got a lot of teaching and discussion from them.
Christianity was all around me and very much in my face during my childhood. It ended up really wigging me out, and I feel like some of the brainwashing is still there. Something in me is still afraid of God and Satan. That is part of the reason I am so resentful. I don't like seeing kids taking that stuff seriously. If it weren't for the threats of eternal torture, I would not mind so much.