It is factually incorrect. Many countries you've posted on have tribal factions not indigenous to that area, Including China and Africa. So If you really wanted to give those countries back to the "natives", current residents would be in a lot of trouble everywhere!

You are also implying native mentalities in a static way, but you shall see how dynamic migratory patterns really are when SHTF scenarios take place! Just ask the indigenous Egyptians or the indigenous Australians about the relativity involved and thine eyes mite open!