Harry Potter argument essay?

I'm trying to write an argument one-main-point thesis on the harry potter book series and how christian parents believe these book aren't good for children to read. I realize that not all parents and teachers believe that, but let's just pretend that I'm trying to convince a religious parent that these are wonderful books to read to their children. I write some example paragraphs that parents might look at seriously: the way humans (aka muggles) are viewed in the stories, Harry's behavior in school and his two friends (Ron and Hermione) acting like second parents to him, and the witchcraft shown in the book may encourage children to practice. I sent my essay to an online writing tutor, and she made a correction I'm having trouble figuring out how to fix. This is part of my first paragraph where I'm having trouble with: "Every so often, I hear rumors about parents or teachers being concerned about the Harry Potter Book series. They claim that children shouldn't read these books because they have a dangerous fantasy-like atmosphere." My online writing tutor said, "Actually, the controversy was more religion-based. Because the Potter series uses witches and black magic, the concern was that they would influence children negatively." What do you recommend I do to rephrase that last sentence in my first paragraph essay? by the way, I would appreciate it if I get serious answers.