Question fit for Blondie types.
Happiness book:
"19 One tactic that he has used is by encouraging the view that there is no Devil or Satan. He is like a criminal who spreads the idea that a crime syndicate does not exist, thus lulling persons into a false security."
The Devil wants to present as if there is no Devil.
Who therefore would want to present, after many, many decades to the contrary, that there is no "evil slave?"
Legit question.