bigot: A person who regards his own faith and views in matters of
   religion as unquestionably right, and any belief or
   opinion opposed to or differing from them as unreasonable
   or wicked. In an extended sense, a person who is
   intolerant of opinions which conflict with his own, as in
   politics or morals; one obstinately and blindly devoted to
   his own church, party, belief, or opinion