Some people point to scriptures in the Bible that forbid the use of magic and claim that Rowling's books promote witchcraft. Although the Bible probably wasn't talking about flying cars and broomsticks, some have demanded the removal of Harry Potter from schools. Harry Potter books have even been literally burned. Often, people forbid these books without having read them, or skim through looking for "evil" bits to take out of context.
For one example, ChristianAnswers.Net says this about the "troubling" lightning bolt scar on Harry Potter's forehead
"his marking causes some concern, as the lightning bolt, in mythology, is known as Thor's calling card (the god of thunder, rain and fertility), later used by Hitler's Nazi party in the form of two crossing lightning bolts"The Nazi swastika used by Hitler was not two crossed lightning bolts, but an ancient symbol that dates far back in human history and one of those ubiquitous shapes used in ancient cultures. Harry Potter's bolt has nothing to do with the swastika and the symbol itself was benign until Hitler hijacked it for his purposes.
Others fall back on the assertion that the books are too gory. Of course, the image of a man being beaten with a cat o'nine, nailed onto a wooden cross, and stabbed with a spear is shown to children who are too young to even speak but the hypocrisy is lost on the anti-Potters. Most children aren't at all bothered by the mild violence in the Harry Potter books and if a child does have trouble, that doesn't mean one should ban the book from all children.
Consider Glinda the Good Witch, who was first depicted by Frank Baum as a beautiful red head with blue eyes and a pure white dress. In the classic, unforgettable 1939 film starring Judy Garland, Glinda is even more appealing. If Glinda isn't advertisement for witchcraft, then what is?
What about Gandalf from The Lord of the Rings? Or Merlin from the King Arthur myths?These characters are not new, in fact Merlin's been around for ages- literally.Why haven't fans of these older wizards turned into devil worshiping, blood drinking, fornicating pagans?
An additional argument claims that Wicca is a religion and that Harry Potter books violate separation of church and state. However, Wicca is a nature based religion that involves the worship of a God and Goddess. They don't worship Satan & don't believe in Satan, as he is a Christian construct. "Magic" to a Wiccan is not yelling "Avada Kedavra!" or "Expelliarmus!" but really the "channeling of energy" and magical thinking.