But his mother was an American citizen so your point is irrelevant.
Pardon me (no, I’m not sorry) I want to jump in here and ask you, what proof have you SHE was his mother?
Go on, be honest, the answer is NONE.
Now you are demonstrating to me that you have not learned enough about this topic to discuss it sensibly. Aldo Mario Bellei had an American Mother too, yet he lost his citizenship because he didn't comply with residency requirements. "Natural born citizens" do not have to comply with any residency requirements, and their citizenship cannot be stripped away from them unless they commit an affirmative act of Allegiance to another nation.
A "natural born citizen" does not have a choice to be a citizen of another country, he has only ONE CHOICE, and that is his "natural" country. Anyone that has a choice is not a "natural citizen", they are a hybrid of two or more Nations. (This condition did not even exist prior to 1922. Women automatically acquired the citizenship of their Husbands upon Marriage. ) Allowing them into the office of the Presidency is causing EXACTLY what the founders created Article II to PREVENT.