Our North American ancestors did not see themselves as stealing land that they cleared and planted at great cost, using their superior tools, just because some Indian hunting parties occasionally passed through it. If you want a good example of theft, consider what happened when the Normans conquered England in 1066 and made serfs out of the entire indigenous population.
All for naught. We now all live on the giant Indian reservation. Where we pay taxes, have no private property, regulations and forced obey the rulers appointed over us.