Oh good grief--you have an interesting thesis here (without sufficient evidence, but you at least have a little and it's at least an interesting idea), but the above is absurd.

The Aztecs were an expansionistic, violent, colonial power. The "vanquished tribes" (e.g. Tlaxcalans) hated the Aztecs, which is why they were eager to join forces with the Spanish to overthrow Montezuma.

Cortez was no angel, nor were the Spanish, but the idea that the Aztecs were laudable even by the standards of the day is laughable.