"Exterminate All The Brutes" - an excellent docu-series and book for anyone interested in why many Americans believe things like this, and/or things like the antebellum period existed as a time of peace and not one marked by domestic terrorism and gov-sanctioned violence, and/or things like cowboys were the good guys (look up scalping and how it was amplified by the American government with the use of rewards for bounties)... and on and on