Obama Sr WAS under the jurisdiction of another country- Kenya. As such, Obama is NOT a NBC.
What you say is true of Obama, Sr. Unfortunately, his mother was not and IF Urkle was born in Hawaii he is NBC no matter the father’s status. IF he was born in Kenya as one of his grandmother’s claims then he is NOT natural-born.
Today if he were born in Kenya to an American citizen even underage as his mom was then he would still be natural-born but not at that time since the American citizen mom had to be of age to pass on citizenship. That has been changed by Congress.
So the case still boils down to WHERE he was born and we don’t really know. There are conflicting claims by family members as to the hospital where the blessed event took place.