Simple:
The Founder Father’s included NBC within the Eligibility Clause as a means to prevent someone born with foreign allegiance from every becoming President and thus Commander In Chief of the US Military. The intent of this is documented. This prevented those that were citizens of foreign countries from immigrating and influencing the Presidency.
So an NBC is someone that is and only is a US citizen at birth, thus having allegiance only to the USA. Dual Citizenship can not be NBC as the intent of including NBC within the Clause was to prevent foreign influence/allegiances. To be NBC there can be no other possibility of allegiance or citizenship claim.
Fact: Cruz held Dual Citizenship with Canada until 2014. Cruz until denouncing his Canadian Citizenship had allegiance to Canada.
Fact: Cruz is ineligible.
He was thought to be ineligible from the beginning- remembering Civics class from years ago. However that was then and this is now. ‘Folks’ today have glossed over so much of our Constitution to the facts they wish to espouse. It was suggested at this time the Naturalization citizenship test shows only one parent need be a citizen - not both parents. Just how far have generations wandered off the beaten path?
Do you know how good I feel at the moment?. knowing I was right in thinking the facts learned were set in concrete. It’s the feeling of graduation day all over again. :-))
However, we all must remember that nothing we were taught can be deemed ‘significant and correct’ until the high courts give us permission to do so. The nightmares which began in Civics have lived in my heart for all this time. Back then it was felt we would come to this act in the play. It seems we have arrived.
So, every child born of U.S. military parents stationed abroad is ineligible to serve as POTUS.
Is that what you mean? Because that's what you're saying.