
I don't think that a lot of self-proclaimed "Christian witches" belong to any mainstream church as you describe. That is the difference. I will wholeheartedly agree that you will not find, for instance, a Southern Baptist witch. One science professor I used to know was a member of a Baptist church and he taught evolution in his classes. This used to get him in trouble where he attended services and it drove him crazy at times. I don't know how he put up with it but I remember talking over it with him. Many forms of Christianity have come to terms with the scientific Theory of Evolution, but not where he went and not where I was stuck at that time.
Early Christianity was very radically different, before Constantine took it over and twisted it up, leading the West into the Dark Ages. This gets a lot of Bible thumpers bent out of shape but by many historical accounts, early Christians did not even believe in the existance of Hell or at least not eternal torture in Hell. Those origins are pointing to ancient Roman paganism when they wanted to get the masses brainwashed into their militaristic way of life.
You only mention the Pope but like I said, there are over 30,000 different forms of Christianity and they don't all follow the Pope any more than all witches or even all Pagans run around worshipping Satan. Not even many Satanists worship Satan (LeVeyan Satanists, specifically). Not all of them are groveling around begging forgiveness for being born.
I find Gnostic mythologies the most interesting as I type this post. They are of the belief that Jehovah of the Old Testament was an entirely different deity than the one that Jesus addressed as "Heavenly Father," and that the Holy Spirit is in fact a feminine being known as Sophia.