Years ago, there were the fundamentalist types who would've thought that the vampire/occult theme was a cutesy backdoor into pulling kids into satanic occult stuff. Same sort of people who tried to stigmatize D&D and video games. Same sort of people who wanted to censor books, music, movies, etc.
In 2019, we have a new kind of fundamentalist running around trying to de-platform wrongthink. I see them as just the 2019 version of the same people.