It seems to me from what you say is that a duel citizenship person would have to have birth blood relationship if allowed by the two different nations. For example would my brother and I have dual citizenship by virtue of being born in the USA but our parents were immigrants not being citizens at the time of our birth if the nation of their citizenship did recognize duel citizenship?
My wife's home country is explicit about it. My daughter is a “Born Dual Citizen” for life.
My wife can apply to reinstate her own citizenship, but she would then be a “Dual Citizen” only. Her father was a dual citizen as well. He did the paperwork to reinstate immediately after naturalizing.
Our daughter is special, like Obama, a Born dual citizen.
If Obama stands, Democrats have amended the constitution to include dual citizens with foreign citizenship as NBC, like my daughter. There are many countries that allow it. So the clause has been neutralized.
One day, a man with his finger on the US Nuke button may be an Iranian citizen, raised in Iran, and born in America on his mothers vacation. Democrats will vote for the death of America. It's their nature.
The founders were aware that Kings and Queens in Europe from different countries married, and formed alliances between countries. They produced little dual citizen princes and Napoleons. Sending people to war for slaughter in acquired states was no big deal.
So we had protection against that for 200 years. No longer.