"I can't spend all of my time with my birth certificate plastered on my forehead"
Huh? What does his birth certificate have to do with his faith?
Wingnut has a theory about Obama's birth certificate that he shared with us days ago, prior to this interview. He believes Obama's birth certificate may indicate his religion as Muslim. Wingnut is a smart guy. This theory could explain the reason Obama has been so reluctant, actually downright adamant, about not releasing his birth certificate. This theory could also explain why he answered the question about his faith by talking about his birth certificate, an interesting slip, if you ask Wingnut.
Patrick Archbold, of Creative Minority Report, wrote an interesting, well thought out post about the Brian Williams interview, here.