How could I have forgotten Berezhnaya/Sikharulidze? Thanks for adding them to the list.
I remember once when I was riding a taxi through a city. I got to chatting with the cabbie. It turned out he was originally from Yemen. He said that his father was a guest worker in Saudi Arabia for ten years and would never have qualified for Saudi citizenship. (Keep in mind that both Yemen and Saudi Arabia use the same language and have the same majority religion and similar cultures.) But after seven years in the U.S., this cabbie was able to become an American citizen. He married an American and brought up his children here. I'm glad we're able to have such a setup in this country. I understand Japan's inability to welcome all and sundry to their tiny islands with so little arable land, but it's too bad they can't find some way to allow double citizenship. After all, it wouldn't affect a huge number of people. It's not as if the world would descend on them or anything.