No, it's not. American culture is european culture that got influenced by the ideals of the founding fathers. "Native Americans" are not any more native than the settlers who started the country. All of them were there in the country's conception, so all of them are native. A piece of dirt is not a country so they were native to nothing since there was no country before Europeans arrived and settled it. Also, they practiced cannibalism, scalping, and killed each other's tribes just like Europeans arrived and killed them. "Natives americans" did all sorts of horrific shit and weren't saints, just so you know. Certainly way less civilized than the people that conquered them.