According to official records, the Spanish Inquisition tried 150 000 people, and only 2% resulted in death sentences, so that's 3 000 executions over 350 years of history.

According to Aztec records, for the consecration of the Great Pyramid of Tenochtitlan, 84 000 people were sacrificed IN FOUR DAYS.

You can't even begin to compare the numbers. Many historians agree that the reason a small number of Spanish soldiers could conquer the big Aztec empire is because they could forge alliances with the neighbouring tribes that were completely fed up with them. The Aztec were the Nazis of their time.