Every square inch of land on earth has “changed hands” so to speak, multiple times by multiple peoples, mostly non-peacfully. How far back does a “land back movement” plan to go? The only fair option would be to DNA test bones from before the last glacial maximum and find descendents with the highest genome similarly and reshuffle all existing populations back based on their earliest ancestors. Or move all humans back to Africa and leave the rest of the world to the native wildlife. Or is it just the US and Canada because they were the most recent? Will we include Mexico and make them give the country back to the Aztec, or do they get a pass because Spain isn’t considered as bad as those pesky Brits? Do we try and find populations of tribes conquered and replaced by the Aztec?
Do we have the authority to freeze all national borders as they are right now in perpetuity to preserve national and racial identities? Are you in favor of the world going to war against Russia to prevent colonial genocide against Ukraine? What do we do with the current peoples existing on their lands now? Do we break every country on earth up into ethnic tribal lands, or City-States? European colonialism of Africa and the Americas was broadly terrible at the time with many lasting issues, but it’s not exactly unique in human history, so I am honestly curious what the end goals look like.