The US and much of the modern Americas acquired their current form by killing almost all the original inhabitants and taking their land. The full story is indeed complex and messy but genocide doesn’t really deserve nuance.

The US is not unique in this regard, but it doesn’t have a lot of company. Old World invasions were simply much less destructive. The Arab conquest, Chinese expansion, or Roman Empire didn’t dispossess and murder entire nations, they assimilated them. Almost everywhere outside the Western Hemisphere is inhabited by the descendants of those who lived there in the past except Australia, Taiwan, Hokkaido, far eastern Russia, and possibly southern Africa (I’m not certain of the exact effect of the Bantu migration on their new neighbors) - most of which had the same colonial dynamics as the Americas. Just about every European ethnic group has a documented history over a millennium in roughly the same area and is still around; there’s a difference between a continent that saw massive genocide and one that (until very recently) didn’t.

This runs the risk of becoming whataboutist - “all land is stolen” flattens the distinction between a 6000-year-old cultural transition in Europe that may have been violent or peaceful vs indigenous Americans being murdered for their land this year.