I believe that graphic of a shaman is from a prehistoric European cave painting.
this article is a hit piece indeed. Unnamed sources and unattributed quotes, which means the writer made it all up.
People in general know very little about the way of life of native americans before the arrival of Europeans and it was in general quite rigorous and also violent.
It was an extremely hard life. Starvation was always at one’s elbow. torture and slaughter of enemy women and children were the norm. Some children were taken captive after their parents were killed. Look up Crow Creek Massacre on Wikipedia. This along with lice, fleas, skin infections, etc.
The romantic view of native people is untenable. there were many wonderful things about the various cultures but a clash between Europeans and the native people was inevitable. A tragedy. but liberals are incapable of nuanced thought.