When I was back in California, the Satanic panic was something my friends and would joke about. I remember having several discussions with a Jehovah's witness that would come visit my mom about D&D, and I felt I gave a good show of how the game wasn't evil.
That all changed when I moved to Mississippi. I learned to keep my mouth shut and not even mention the game at school, at the local library I frequented and certainly not at church - neither the one I frequented or when we visited my relatives church (luckily, after the snake handling incident, my dad decided no more of that!).
Worst was when my cousin, who had been playing D&D with us became very rebellious. After he cut a pentagram in his arm one evening, my dad got word of the incident and was determined to throw out my books. After pleading with him and calming his fears, I agreed that to prove I wasn't some slave to the game or involved with the occult by putting the books and whatnot away for three months. Luckily, after less than a month, my dad relented and returned my books without me even asking. Later on, I was always mystified that games like 40K didn't even get a second glance with Khorne and his kin running around local game stores.
To this day though, I prefer not to play in D&D games that have demons or devils as the primary antagonists - so books like Descent into Avernus are just not something you'll find in my collection, and I tend to skip over the entries in the monster books.