THAT would have been political, and would not have been appropriate for the series. What Burns did include were a couple of Hispanic soldiers, who I believe were American citizens, who were part of Carlson’s Raiders in the Pacific.
Yes. I think rather than a “celebration of diversity,” he was trying to very simply state the truth - that America has been the light and home for many people from many countries. He also was correct that we were isolated from the rest of the old world.