Jackson was correct. Indian cultures were stone-age in all senses of the word. They would, and did, disappear in the face of modernity. The 19th Century did not have the quant, late 20th century idea that cultures must (or even could be) preserved in amber, like museum artifacts.
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Obviously you have ZERO knowledge of the American Indian Cultures AND of their influences on our own system of government!
YES there were many different Native cultures just as there were different physical characteristics among the various tribes. The Cherokee were a SUPERIOR culture and should be studied, not denigrated!
Did the American Indians have railroads? Did they have cannons? repeating rifles? Did they have steam engines? microscopes? weaving machines? Those were the things they faced in the 19th century when their culture was competing with American/Western culture. My point, which you ignore, is that old or primitive cultures will always be eliminated by more advanced ones. Do American Indians today drive cars? use computers? Take antibiotics? Watch television? They themselves are part of the process. In America today, we are taught in 2nd grade that everyone is valuable and everyone gets a prize. Sorry, but history and evolution do not teach this.