How did the religious beliefs of the aztec and conquistador differ?

Based on The Harvard Gazette: “The Aztec was fundamentally a culture based on war and agriculture. Their two most important deities were Huitzilopochtli, the god of war, and Tlaloc, the god of rain. The duality of war and agriculture was crucial for the Aztec economy. The Aztecs expanded their empire through military conquest and sustained it through tributes imposed on the conquered regions. Every 80 days, the new subjects of the Aztecs had to pay tributes to Tenochtitlan.” Also, “The Aztec religion was primarily polytheist. They had different gods, male and female. The sun god was Tonatiuh. There were many deities, and they were revered in monthly festivities with rich offerings. There is this black legend that only the Aztecs used human sacrifices in their religious rituals, when there is evidence that they existed in many other ancient cultures that were mostly agricultural societies. In the Aztecs’ case, human sacrifices were meant to please the sun god so that he could continue providing them with light, warmth, and life. They believed that without human sacrifices, the sun could stop and everything was going to die.” The people of Spain adhered to the Catholic religion.