The Aztec religion showed no mercy, even towards children. Priests would kill infants, bought from impoverished parents, with knives during droughts, hoping that the god of rain would show mercy.
Here, Mayan priests boiled children alive, after which the priests ate them. They rejoiced when the children cried before being boiled, because they considered it a sign of abundant rains.
Moreover, I want to add that there is an opinion that the Aztecs excelled in astronomy and, with their numerous sacrifices, postponed the end of the world. Of course, as a Christian, I cannot accept this version, but I think that it also has the right to exist.
Where do we end up when we save the world?