More than a few people with fundamental religious beliefs were distressed by Harry Potter. I saw some interviews with people who had gone through a kind of emotional wringer over their kids being exposed to it, concerned that the books promoted experimentation with the occult. I don't think these people were faking it; I think they were truly distressed by it, some to a seemingly large degree. I suppose J.K. Rowling could feel sorry that the work had that impact on anyone, but at some point you have to realize the response isn't normal or reasonable, and that you can't write based on what the small number of people most likely to be susceptible to it might do. If you did that, you'd never write anything.