Cain + Abel Cainabel Cannibal
Could it be so simple that's it's been right in our face?
Was the "mark of Cain" some sort of facepaint, maybe with blood(?) to signify his cannibalism?
In some Jewish literature, it is recorded that Eve had a dream where she saw Cain covered in Abel's blood before it happened.
Also, in the OT a custom originating with Caanites was the teraphim. The teraphim were shrunken heads. People kept them as household deities.
Could it also be that the communion of wine to blood and bread to body be symbolic of actual cannibalistic rituals that have come down to this generation since Cain?
Could it be that cannibalistic rituals still exist today in other cults, even sophisticated cults in our society?