That reasoning is one tiny step removed from "there are no Native Americans, they moved there during the ice age" (actual line from an English teacher of mine btw) or "you can't do colonialism in Africa, all of humanity comes from there".
Let's not even begin on intra-Jewish racism against Mizrahi Jews in Israel.
I love how anthropology is finally catching up to what indigenous Americans have been saying for generations, they have been here for centuries before the ice bridge, with evidence suggesting it’s been at least 20,000 years, likely closer to 30,000+.
How would indigenous Americans know the movements of their ancestors from tens of thousands of years earlier? Also the ice bridge existed from at least 40,000 years ago as far as I can find.