Slaves helped a little bit and removing indigenous to re-education camps was highly beneficial. They didn’t ask for this but they got it nonetheless. Movement of populations is a primordial requirement for survival
I saw something interesting the other day. Orcas are apex predators and a defining characteristic of apex predators is ‘movement’ they can be found in most major bodies of water in the world. Humans are a parallel example. They inhabit most land areas in the world. The Japanese population is on a serious decline. Perhaps they haven’t reached a point where they have issues with a lack of genetic diversity but they will. My opinion is when that happens it will be manifested in decreasing brainpower.
This ‘cultural’ sacredness thing is a latecomer. I love my Hispanic culture and believe it is superior in some ways. But I was born in the good old USA and my everyday life is overwhelmingly American. Nothing has been lost. With the exception of a little racial purity. Does that make me want to kill my neighbor? Well sometimes but rarely