https://en.wikipedia.org/wiki/Human_sacrifice_in_Aztec_cultu...
https://en.wikipedia.org/wiki/Human_sacrifice_in_Maya_cultur...
Unfortunately, some cultures have this as a part of their history. They need to be taught a different path.
Edit: In my other comment I was flagged, so I want to make sure I'm not misunderstood. I am not making a moral judgement here of any kind. I'm just trying to say, there are cultures out there that have no history of the Judeo-Christian faith, until much later when it was imposed by colonialists. I think this is a net benefit, because their cultural history before was to kill someone when it started raining or some other natural event.