While this will get buried. Remember that the true damage of the European armies occurred when the conquistadors landed and small pox became present in colonial America. This would go on to devastate the American tribes coast to coast.. While we can no sooner excuse Columbus action or any of the European powers that treated native populations as sub-human .

If you want to be truly be upset by European actives please understand that the deck was stack from the onset. As no one on this side of the "pond" has any immunity to small pox. this alone guaranteed success of European efforts, the European mortality rate of around (I think) 30+% of the period compared to accounts of in excess of 50% for native populations.

Furthermore , Europeans had learn the art (if you will) of resisting a Calvary charge over the course of 3000 years and they had learned how to charge over that same period. The native populations had no such knowledge. The nature of Mesoamerican warfare was far different from European style. with emphasis on taking prisoners over out right killing individuals.

Also the political structure is vastly different from what you were taught in school it was not natives vs Europeans it was 1 nation vs the other 499 with Europeans being potential allies to those who best serve the purpose. As we see with the early Spanish conquests native auxiliaries made up A HUGE portion of the military and were vital to the success of the conquest(and some dumb luck).

So given the situation any Eurasian based power that landed would quickly decimate the landscape with disease. As well any potential political interactions with the tribes would lead the European into war vs historical enemies. That would quickly be decimated by better equipment and tactics of the Europeans and the far more casualty intensive combat the Europeans engaged in. Given the situation I can see no other historical outcome.

So while the history of America is ripe with abuses of the native population try to understand that history is very rarely a good and evil situation. Try not to have 20/20 hindsight but instead view it from the time of 15th century and 16th century.

Tl:Dr; history sucks but I can see no other historical outcome for European involvement in the Americas other then European domination.