Evidentally there is a christian Harry Potter out in Britian. I find this very interesting because my first impression of Harry Potter has always been that it had a similar style to C.S. Lewis. C.S. Lewis is of course on of the great christian thinkers of the 20th century and author of several very good books. Frankly I think the "christian Harry Potter" would probably be The Lion, the Witch, and the Wardrobe written by Lewis some time in the 1950s.
Of course some christians don't like Potter or don't like Tolkien. Its pretty foolish especially with Tolkien who was instrumental in leading C.S. Lewis to Christ at Oxford. Some people are just idiots.