So the question now becomes, how can Obama be both a natural born citizen, and a British citizen at birth?
In the same way that I am a natural-born citizen and a Bangladeshi citizen at birth.
You may think that you are, but that's not necessarily the case.
Natural-born citizen means citizen at birth. As I was born in the United States, I was a citizen at birth, and hence natural-born.
So, according to you, an illegal alien's anchor baby can be President.
Nice.
Yes, it is nice. One of the few areas where the United States isn't hopelessly backwards.