LOL. Check out the picture at the site. They are all posing very politely for the picture. If this was a real savage tribe that was at war with civilization, they would have eaten the photographer rather than pose for a picture.
During World War II my father served as a radio operator in the Amazon.
They were on the eastern tip of the Amazon where it is closest to Europe and Africa—airmen in distress landed there from time to time.
He told stories about real headhunters—cannibals that were not that far from their small airfield.
The radio-men were given stern warnings about not wandering into the jungle.