Talking about Europe and cultures that influenced it... Why and since when was the revival of the dead considered evil?
In Greek mythology bringing back a loved one is hard or comes at a price, but it doesn't seem to be frowned upon.
So the precedent must come from other mythology. But which one? In Christianity bringing the dead back is considered a miracle, so probably not here either. So where does the "bringing people back is evil" mind-set come from?