Then there should be no reason not to release the birth certificate.
But that alone does not make the case that he is ineligible. You can repeat that all you want, but looking at facts, there are several real glaring points that make O being anything but a natural born citizen very, very unlikely.
Even Donofrio accepts that he was born in Hawaii.
Even if he was born in a hospital in Hawaii, there could (and probably are) all kinds of reasons. Race, religion, that sort of thing. But unfortunately the question is whether there's a reason to force him to release it, which thus far there isn't.