Yes, luckymortal, there are many who profess different "forms" of being a witch. But that is not what I said! I will say it again.
A Christian is one who believes that Jesus was the son of God; a witch doesn't. As many others do not believe it either. In Islam Jesus is acknowledged as a prophet;not a God. Ergo, you cannot believe in Christianity and also believe in witchcraft. It is a contradiction in terms of reference. But you can be a Christian and believe in magic! That, however, is not the same thing.