The Order of the Dybbuks is a cult started by Liz Bane in the 70's. They were a group of people who believed they would achieve immortality by taking over the bodies of French people. In 1973, 28 Dybbuks walked into a crowded Parisian café on the Champs Elyées, pulled out ceremonial daggers and massacred a hundred French citizens, though Liz herself managed to escape prosecution. The cult presumably disbanded or was forced to disband after the incident. The order does not seem to be modeled after any specific cult, but rather real cults and incidents of ritual murder.