Oy vey!
Volume 12 – Citizenship & Naturalization
Part H – Children of U.S. Citizens
Chapter 3 – United States Citizens at Birth (INA 301 and 309)
In general, a person born outside of the United States may acquire citizenship at birth if:
•The person has at least one parent who is a U.S. citizen; and
•The U.S. citizen parent meets certain residence or physical presence requirements in the United States or an outlying possession prior to the person’s birth in accordance with the pertinent provision. [2]
No court had to grant him citizenship.
A law granted him citizenship.
By your logic, someone born in the US also is granted his citizenship by the same law. Or did you fail to notice:
A. General Requirements for Acquisition of Citizenship at Birth
A person born in the United States who is subject to the jurisdiction of the United States is a U.S. citizen at birth, to include a person born to a member of an Indian, Eskimo, Aleutian, or other aboriginal tribe.
So since both being born in the US and being born to a citizen outside of the US are covered by the same law, I guess there is no such thing as a "natural born citizen".