How can they not be? Someone born with citizenship from two country's can be a Natural Born Citizen of the US?
"I was born on US Territory to two American citizens. By the most strict "Birther" definition, I am a natural born American citizen."
Not so. If you were born on "US Territory" you were born on us soil...were you not? Therefore, you, in that case would in fact be an NBC of the US.
"Both my parents were also born on US soil, making them at least 14th Amendment Citizens from Birth."
If you where born on the soil of the US (whether a state or a territory) AND your parents were citizens (either NBC themselves, Article 14 or Naturalized) at that time of your birth, you would not have been subject to the laws and/or privileges of a foreign country by way of being a citizen/subject of that foreign country.
"Now you have changed the subject."
No, I didn't. It's related. If he's born with foreign citizenship (subject) AND he IF he was born in HI...he would have been born a citizen of two country's. A dual national. How can a NBC of the US be (also) at birth the citizen of another country?
" My American citizenship cannot be "governed" by Italy. Neither can my Italian citizenship be "governed" by the United States."
Precisely the point. Therefore, how could an NBC of the US, also be under the jurisdiction/control/right to privileges of another sovereign country?
Since it's not explicitly defined in the Constitution, we must look elsewhere. We must look to the framers intent. Did they intend, post grandfather clause, to include someone born with citizenship of another country, to be considered something different than a citizen and therefore a Natural Born citizen? If there is no difference between the two, they would not have made the distinction in the Constitution. They would not have done away with Hamilton's suggestion of "citizen" and gone with "natural born citizen" (no doubt as the result of Jay's letter) They clearly differentiated the two, even within the actual requirement itself.
Furthermore, there are early SCOTUS cases which include, in their dicta, the same definition for NBC (born in country, to two citizen parents):
"THE VENUS, 12 U.S. (8 Cranch) 253, 289 (1814) (Marshall, C.J. concurring) (cites Vattels definition of Natural Born Citizen)
SHANKS V. DUPONT, 28 U.S. 242, 245 (1830) (same definition without citing Vattel)
MINOR V. HAPPERSETT, 88 U.S.162,167-168 ( 1875) (same definition without citing Vattel)
EX PARTE REYNOLDS, 1879, 5 Dill., 394, 402 (same definition and cites Vattel)
UNITED STATES V WARD, 42 F.320 (C.C.S.D. Cal. 1890) (same definition and cites Vattel.)"
There is no SCOTUS dicta, indicating that someone born with dual citizenship (or foreign citizenship) is considered an NBC of the US.
Exactly, and BHO ain't one.
Because, unlike you, both his parents were not citizens.