The stolen land narrative is retarded, and like many leftist talking points show a complete ignorance, or worse disregard of history. When you look at a world map every single nation you see on this Earth is a result of "stolen" land. Frankish people aren't the original inhabitants of France, and Turks aren't the original inhabitants of Anatolia. I could literally go on forever. Not even a place like Japan is exempt from this point. This of course, even includes the Native Americans before European contact which is something leftists never bring up.
What the USA, and other nations in the Americas did to the natives isn't special or unprecedented. The only thing unprecedented is how easily the Europeans were able to conquer such vast swathes of land for little military cost. Hell even Africans put up a much better fight against the colonial powers than any native tribe or nation did in the Americas.
All land is "stolen" land, woe to the conquered and all that.