The BC that Hawaii provides is not the original document. It just reflects some of which is in the file. As Zullo indicated, this information can be changed 60 years later.
I am sure that Obama's file is filled with all kinds of stuff. As Fukino said, it is half handwritten. The microfilm would be a better source. It is not that easy to splice microfilm, especially if you can determine the age of the microfilm insert.
Hawaii is not protecting Obama so much as it is protecting the integrity of the birth certificates it issues.
And I think this is a key observation. I have read several articles alleging that Hawaii perpetuates an industry of creating birth certificates for people not born in the United States and it is being used as a back door to grant foreigners American citizenship without having to go through the naturalization process.
Hawaii has apparently been playing this game since the very beginning, and if they admit their birth certificate cannot be trusted for Obama, they may involuntarily endanger all the rest of the fraudulent birth certificates they've issued in the last 50 years.
Hawaii has reasons BEYOND Obama to block any inquiry into his vital documents.