As much as the Villagers love religious belief, they quickly get uncomfortable when people actually start talking about what religious beliefs actually are, other than believing that women should stop being slutty slut sluts and gay people should go away.
Devils, angels, heaven, hell, purgatory, and, yes, ghosts and other spirits aren't crackpot beliefs, if by crackpot we mean nutty and rare. They're common. I'm not the one to ask about support for these beliefs in scripture, because I don't know and don't much care, but regardless lots of people believe in this stuff and attach it to their religion.
Also, too, The Omen was a biopic.
