Bigot: a person who is obstinately or intolerantly devoted to his or her own opinions and prejudices

Bigotry is not confined to racism. I see it as a term representing the inability to consider things while suspending pre-judgments, and a refusal to acknowledge facts. Not all opinions are based on facts. Obstinate refusal to consider facts is bigotry.

As in everything, there are degrees...

You never change things by fighting the existing reality.
To change something, build a new model that makes the old model obsolete.
R. Buckminster Fuller