The Spanish arriving there was analogous to the Allied armies arriving at the Nazi death camps. Thank God that civilization was wiped out.
Small pox wiped out about 90% of the Americas population in the early 1500s. The civilization in North America was a shell of what had been.
I am not one of those who blames the Europeans....but the facts are pretty clear. We wiped them out and burned their knowledge. Just as the Mohammedans did in Egypt.