Answer:
The Aztecs were a pretty peaceful society, and the Europeans saw them as something to conquer and spread their religion to. They also wanted to use their capital (Tenochtitlan) to exploit the land for gold.
Explanation:
The Spanish conquistadors that made their first run-in with the Aztecs took note of their religious rituals and, being the dominantly Catholic country they were, thought it was their duty to start a mass conversion to Catholicism. Additionaly, a big reason why Europeand were exploring in that reason was to find stones and metals. Their main target was for gold and silver, if possible.
