>>/9259/
kek, I accidentally hit the reply button, before writing more. Some Bernds claim that this is natural behaviour and serves as population control and this kind of killing and eating humans or witches was done in pre-Christian Europe as well. 
original link of the story: http://psychohistory.com/books/the-origins-of-war-in-child-abuse/chapter-7-child-abuse-homicide-and-raids-in-tribes/