It’s disingenuous to imply “industrialists” are the only ones unhappy. Anyone who doesn’t want to die a stranger in their own land is also concerned.
Yes, Native Americans ought to get their land back. (What do you mean “no, not like that”?)
What does "die a stranger in their own land" mean and how does it relate to birthrate?
If the concern is one that sounds horribly like eugenics, perhaps this hypothetical "people" should indeed go the way of the dodo.