I'm a Christian and I don't think Harry Potter is all that bad, beside It entertains kids, and gets them to read books, even my son has so many books about Harry Potter he's a huge fan also. The only reasons some parents forbid their kids in watching Harry Potter because the scripture in the bible does have something being said about avoiding witchcraft. But, it's not gonna brainwashed the kids, it is just a story. It does not make kids tempt dabbling in witchcraft in my opinion.
I don't mind having my boys watch The Golden Compass either.