I think it varies by geographical zones. While the Incas were a violent empire, it seems the Caribbeans were indeed populated with peaceful communities?
‘Caribbean’, by the way, is derived from the ‘Canib’ Indians, from which we get another sweet and gentle word: Cannibal.
Idealizing these cultures would be similar to some revisionist historian in 2525 waxing poetic about the Nazis in the mid-20th century.