It tends to be matriarchal whereas both Christianity and Satanism are patriarchal and male chauvinist. The latter two are merely opposite sides of the same coin. Witchcraft, as the Old Religion, is a coin of a different vintage, predating both. Doing evil is supposedly against one of the basic principles of their religion. If you do anything bad, it comes back to you three times.
Any magic witches do is 'for the good of all,' as they say at the end of their spells.
Most modern practitioners of witchcraft have managed to cast off the old image and have successfully convinced the public of their harmlessness and good intentions. We don't harm or seduce people. We are not dangerous. We are ordinary people like you. We have families, jobs, hopes, and dreams.