Kay...

I am a Christian. I am also a HUGE HP fan. All I can say is that these folks no more represent Christians than Laurie Cabot represents Wiccans.

I think the HP books are a great way to teach children that evil exists, and that good can triumph. One of the main messages of the HP books is that his own Mother died to save him, and it was her love and sacrifice that spared him.

How much more Christian a message can you get than that?

There are always extremists (From all walks of life, not merely Christian), and they always seem to be the most vocal amongst us. Ignore them...they will find something else to hate in short order.