As far as I know, fears concerning witchcraft/use of magic arose from the need to preserve mundane power and wealth.
Before the fall of the (western) Roman Empire, sacrifices -- and divinations that made use of them -- were banned. Not because they were forbidden by Christian doctrine, and not because the practitioners weren't Christians. It was a concern about the real possibility of someone having the power to predict the death of the Emperor, or the name of his successor. Since Emperors had a very short life expectancy for reasons unrelated to religious beliefs, practices that had been part of the culture in more stable times became forbidden.
Centuries later, any comment that seemed to maybe predict the death or successor of a monarch was suspected of treason.
And of course the majority of witch trials in the middle of the last millennium were about potential material gain for the accuser. Today we don't call the victims "witches" and the predators "inquisitors". Preying on people to take their money or property is criminal, as you can see from watching the ID cable channel.
Only Man cares for Man; the Universe doesn't give a shit. -- Marcelo Ramos Motta