Since a child’s mind is immature, Christian parents steer clear of these books because casting magic, spiritual orbs, flying brooms, talking animals and more may seem fun to a child, but parents believe that their children will not be able to know reality from fiction.
As some parents who have read the book themselves believe that Voldemort himself is actually the Devil. (I mean wow he kinda is in the books but that's not the point.
The fascination that children have developed for the ongoing magic use while reading the Harry Potter series makes major worries for many religious parents to cut of the book and lead the child away from such evil thoughts. (And I get that parents want to protect their children from any harm, but instead parents are just forcing their children to stay away from fiction books and close off their imagination. It's the good part about being a child, having an imagination.)
Harry Potter himself is a good role model for all children because he has overcome all the hardships that has come his way. Harry Potter can also be a person to sympathize with as he lost his parents to Voldemort at such a young age. He faced his fears, believed in his friendship, and the pure of this world. Reading the Rowling’s books lured children away from technology, making them focus on the story itself with all its humor, adventure and friendship.
Overall, these books are inspiring and just painfully simple that many like to think is over the top, but it's just a book to sit down and relax with.