So why cant we just take it from them?
Also untrue, they had land they claimed was their tribe's and territory. They just didn't have individual landholders afaik.
... For those reasons, we can see why Communists always keep going back and pointing out the Native American story as a counterexample against Capitalism, but nobody ever said that Native American tribes never actually existed -- or else there wouldn't have been any wars or conflicts within Native American groups, now, would there?