no no no no no, white man is always bad.
90s revisionist history.
As with most things in history, and human nature, there are very few wars that are a 100% good guy against a 100% bad guy. If not for the holocaust even WW2 wouldn't be a white hat black hat ordeal, and that wasn't discovered until the end of the war. The point is, Cortez was after gold and glory and Montezuma spent his time "harvesting" humans from rival tribes and executing astrologers and civic leaders that give him an answer he disagreed with.