Well I think they are more aware of their bible than you are loco
"Do not allow a sorceress to live." Exodus 22:18
"'A man or woman who is a medium or spiritist among you must be put to death. You are to stone them; their blood will be on their own heads.'" Leviticus 20:27
Let no one be found among you who sacrifices his son or daughter in the fire, who practices divination or sorcery, interprets omens, engages in witchcraft, Deuteronomy 18:10
Aah I'm just poking fun. But black magic and all that garbage is real, only disgusting mentally sick people engage in it. It's quite common in asia, south america, africa, middle-east, etc... only certain parts of europe, and very rare in north america except by immigrants.
They will do all kinds of disturbing satanic rituals to 'get' something in return for their 'sacrifice'. Whether it's cursing someone with a sickness, creating family problems, enmity between people, seduction, etc... via demons. I know it sounds far fetched and movie like and fairy tale fiction superstition, etc... to westerners, but its because in the west people are rarely exposed to this crap.
The only problem is often times ignorant people will accuse every mishap to sorcery or black magic which happens very often as quite possibly in this case more than likely, only God knows.