Being a Christian also means you accept the Bible and the churches teachings. Perhaps you have missed what the church has to say about witch craft. You can of course try to make a relativistic argument and say that one need not follow the bible to follow Jesus, though that's where you will read about Jesus and his teachings. Then you could say that one need not follow all the bibles teachings, however if you do that, then the book itself becomes next to meaningless as a religious book. As far as history goes it's a poor history book, with much of what occurred in it being things that can't be proven.
You can't pick and choose the parts of the bible you will follow, and in turn you can't cal yourself a Christian when what a Christian is is contrary and against witchcraft. Utter nonsense, which could only be dreamed up by someone who embraces a relative view of most everything. Nonsense.