The Aztec believed that they owed everything to the gods who created themselves as well as the world around them. The would perform sacrifices in order for a good crop yield or good weather among other things. They believed that the best way to repay them was to offer up blood to them in regular rituals.
After the Holocaust, the world vowed to never again permit the crime of genocide. In the many decades since, genocide and mass violence have played out again, and again.
