NBC is a clear title one generation back and says the person is American and nothing else such that everyone agreea.
Where do you get citizenship from? Some say mom, some say dad or some say place of birth.
When mom, dad and place of birth all agree, that is the least diluted, most pure, highest quality citizenship. That person is an American, natural born, and not a person or nation can say otherwise. S/He has a clear, clean American title.
With Cruz, none agree. He could be from America, Cuba or Canada, depending upon which is credited with being the source of citizenship.
In this sale, Cruz has a blemished title, so to speak, that has been made wholesome again by both law and treaty, but not by the circumstances of his birth.
To be eligible for President, you need a clean, blemish free American title. That was the intent. That was also in harmony with international laws at the time and now.
And...also compatible with human nature. Do you remember way back when it was controversial to have a NATO or UN officer command American troops? Citizen soldiers want an American to lead them. It used to be important, especially in the beginning, hence the NBC requirement.
It may not matter to you, but it matters and it will be a fight should he run.
If I were a progressive demonrat or a GOPe french rino, I'd try to get him to run. Divide and conquer! And, maybe make the obama problems go away at the same time.
/johnny