I think I originally internalized that idea in a lot of ways as a kid. Nothing obviously traumatizing happened, so I think it was because a) I realized I was different from others in the way I thought, b) was often bullied, c) was punished for things as a child, including getting spanked with a spatula/belt, and d) as an autistic and OCD person, I internalized religious and social messages to a more literal degree than they may have been intended