I was lucky. I grew up with very religious parents, but they were also open minded. My father was a wargamer of the old hex and counter style and got me into gaming. I was always interested in d&d, watched the cartoon a bit, when my parents weren't up yet on Saturday mornings, though they told me not to, and was intrigued by the stacks of dnd books at the game stores when my dad took me to them. One day while we were out shopping my mom went to some other store while my dad and I went to waldenbooks and I saw the red box basic set on clearance because the dice has been taken out of it, convinced my dad to get it and whoo boy was that a fight when my mom found out. I got to keep it but never really got a chance to play it with anyone. I fought Bargle solo so many times though... i wound up buying a few other rpgs in the mean time, toon, gurps... still had no one to play with though. Fast forward to high school, and I found a group of friends that played, and my mom was skeptical but kept an open mind.
She had me check out the 2e phb from the library so she could read through it, which she did cover to cover over a few days and she finally said "sure, I have no idea what the big deal is, there's nothing troublesome in here" and that was the end of it, I got the go ahead to buy my own phb and I haven't stopped playing since. Unfortunately in school I got a lot of crap about it, had one girl I liked tell me i needed to burn all my books to save my soul, and she wouldn't talk to me until I did. In front of her. That never happened. Had a good friend I played a game or two with tell me he couldn't play anymore because it was evil and I couldn't hang out with him anymore because I probably didn't have a soul anymore. That stung a bit but it was par for the course in Texas in the 90s...