Much of witchcraft is a reversal of Christanity. For instance, witches say the Catholic Mass backwards, and it becomes the Black Mass. They accept the Eucharist but underneath their tongue instead of on top--and then spit it out into the privy. In The Witch's Trinity, they pray with their hands pressed together and facing downwards rather than towards heaven. I'm actually not sure if I made up that detail or if I saw it somewhere in my research.
Old witchcraft woodcuts illustrate these reversals. Here is a new witch trampling upon the cross rather than venerating it. And please note--the witch is a male! The image comes from the Compendium Maleficarum, a book that explained everything about witches (borrowing some information from the earlier Malleus Maleficarum, another witch hunting Bible). This woodcut is from a 1610 edition, reproduced in Brian Levack's The Witch Hunt in Early Modern Europe. The Compendium Maleficarum was written by a Milanese monk named Francesco Maria Guazzo.