I've been running into this on X when I speak out against foreign invasion and White displacement. I usually go with a mix of: 1) We conquered it fair and square, the history of the world is full of populations at war and being displaced. Why should I sit back and allow it to happen to the civilization the White man has built here? 2) That was 300+ years ago, what happened in the past doesn't justify these actions in the present. 3) Native Americans were raping and killing each other long before we got here anyways. I'm not wholly satisfied with this retort. Is there a better angle or argument?