All this doesn't matter, except to the scientifically curious.
For political reasons, the media elite and the government have decided that the ancestors of the current "native Americans" are the original inhabitants of the Western Hemisphere. And in the view of the elites, the litany of wrong committed against them is endless.
Hence, "native Americans" are victims and are entitled to deference and special privileges.
Once a decision of this sort is made, ITS MADE. GET USED TO IT.
"Dr Zaius, why would Apes make a human doll that talks?"
Once a decision of this sort is made, ITS MADE. GET USED TO IT.