I'm wondering if the master has a reason or ulterior motive for insisting on such reasoning.
I don't know, doesn't feel like it's just because "ghosts are evil"
yeah the master is corrupt. Its obvious he always sides with those who are rich and is doing it for the money not his moral "mission" that he uses as an excuse
Old master is probably using ghost suffering as an energy source. WHat bullahit ritual to sacrifice ghosts? He must either be a ghost himself or an evil guy.