"traditional Jewish communities would consider you to be a Jew only if there was an unbroken genealogical line from your Jewish great-grandmother to you, i.e. your Jewish grandmother is your birth mother’s maternal grandmother. Liberal streams of Judaism would not consider you to be Jewish, as neither of your parents was Jewish and you were not raised with Judaism."

http://www.jewishboston.com/ask-a-ra...-i-jewish-too/

I don't know if the same is true for Muslims.

I think the poster was asking if someone's faith should disqualify them from being President or at the very least, not be trusted. Some were concerned that the Pope could tell JFK what to do.

I thought McCann answered that question.