Why are Americans (except birthers) so ignorant of US Law and the Constitution?

Your statement is factually wrong. The constitution states that a person who is a natural born citizen which is any person born on US soil ie. Hawaii which was a state when Obama was born. In fact the constitution goes on to state that the candidate has to have lived in the states for 14 consecutive years. Why do you think that was put in the constitution? I know do you?