I don’t know what all the fuss is about. There’s nothing wrong with killing sorcerers and witches.
The churches are being hypocritical if they say there is. Their own bible, the word of their god, says it’s okay. To wit, “A man or a woman who is a medium or a wizard shall be put to death; they shall be stoned with stones, their blood shall be upon them” (Leviticus 20:27).
I don’t know what those people in the highlands are doing burning them, though, that’s the punishment for whores. “And the daughter of any priest, if she profanes herself by playing the harlot, profanes her father; she shall be burned with fire” (Leviticus 21:9).