Christianity and Magick

I used to have a friend who did, and still does the same thing. They act like I could kill them, and they're a full-blooded 'I can't sin or I'll be damned' and he's one of those which you want to avoid, you know that feeling? It's kinda crazy, because at first he was fine with me, but even though I told him my only practices were Healing and Illusionary, he still freaked out, and started being all stereotypical about Witches and women. He got suspended once for saying something, but that hasn't stopped him. Now, I just avoid talking to him if I can.