This is a modern amalgamation of the Noble Savage fallacy and the Appeal to Nature/Naturalistic fallacy, where native populations and primitive peoples are often considered wiser and more moral than modern people due to their simple way of life and their connection to nature.

The truth is that human nature is the same regardless of the context, and constant warfare, rape, slavery were commonplace among Native Americans and some even practiced self-mutilation, child-sacrifice and other atrocities.

Remember, the African tribes were the ones to kidnapped and sold their own people to the European slave traders.

Human nature is the same everywhere you go. Only people that learn to overcome their nature are able to move beyond it. This is just as true for people living in the USA today as it was for African tribesman living in Africa a thousand years ago.