How did the Spanish explorer affect the lives of the Aztec people?

The effect the Spanish had on the Aztec Empire is a mixed lot. Historians often disagree on the impact, both positive and negative, that the Spanish had on Aztec civilization. Under the leadership of Hernan Cortes in 1521, the Aztec Empire was destroyed. The Aztecs were a primitive people who practiced rituals that were inhumane. Spanish rule put and end to those cruel traditions

He had killed them I'm pretty sure