Debate is good; dogma bad. Let's then just say that the Zooarcheological evidence indicates that the late Pleistocene mass extinctions (in say, the Americas) strongly coincided with arrival of skilled human hunters. Whether aboriginal overkill or ecological change brought on by the burning of fire-sensitive vegetation is the cause of the disappearance of large mammals, it still gives lie to the silly notion that the "natives" live in harmony with Mother Nature.
The Clovis overkill hypothesis is that human hunters arrived in America about 12,000 years ago and promptly killed off all the large mammals.
Two major problems:
1. Evidence is growing all the time that humans have been in the Americas for much longer, as far back as 20,000 or 25,000 BP.
2. A great many other animals went extinct at the same time, including ones unlikely to be hunted by people, implying that there were other causes involved.
I have a very open mind on the subject. Something happened then, and humans moving in may have been a part of it, but they are probably not the whole story.
Agree that the idea of "native Americans" living in harmony with nature is hooey.