Christians can be anyone, Sons/daughters are of God
I know a witch who also claims to be a Christian
I know a witch who also claims to be a Christian
There are people of the occult that hold unto an occult interpretation of the Bible,spiritual evolution.
To claim to be a Christian is not a Christian,if they view the Bible from a viewpoint of the occult,for they will say Christian for they follow Christ,but they will not follow Him as Lord and Savior,but as a good teacher in spiritual enlightement,which is not the right viewpoint.
You do not seem mainstream Christianity confessing witchcraft in their Church,and if someone claims to be a witch,and follow Christ,it highly likely they do not view Him in the right light,but as a good teacher in spiritual enlightenment.