A bigot is a person who is obstinately or intolerantly devoted to their own opinions and prejudices, especially one who regards or treats members of a particular group (such as a racial or ethnic minority) with hatred and intolerance.
Usage examples
John's father was a bigot who held strong prejudices against people from different religions or cultures.
I remember when christians were nice.Now they seem like a bunch of bigots who want to shove their crap down everyone's throat.If they want people to respect them, they should lead by example. (religion.blogs.cnn.com)
You just raise expectation that can not always be met and when mothers need help they feel a failure because of bigots like you. (dianespeier.com)
People are so quick to label others as bigots in these discussions. (religion.blogs.cnn.com)