True.
But there also were such a thing as serial killers in the past as well.
Generally with human sacrifice there is a great deal of ritual about the burial as well as the death.
Face down in the midden does not seem to fit this kind of ritual at all but we know so little about how they thought as they lacked a written language.
It sounds like “honor killing”, to me.
It strikes me that we have to “guess” at the actions of our ancestors. We don’t pretend to understand their culture, at all.
There also seems to be a great tendency to assume religious ceremony in everything. All collections of stones are altars, as if people had no other purpose to gather.
Godless liberals have been murdering children for a long, long time.