Your misinformed opinion only.
Uhm, actually no. You can believe whatever you want but until it is proven in a court of law I am right. I am not misinformed. I have read the arguments. I know what by right of blood and right of land means whether in English or Latin. However, there has never been a case which defines natural born by the Supreme Court, and since the 14th Amendment, you can't use the old citizenship cases.
I don't disagree that the birthers could in theory be correct. However, there is no court precedent. And there is ZERO PERCENT CHANCE the Supreme Court will take the case. And even if they do take the case, they will most likely side with Obama. The birth certificate is the motherload of fool's gold.