bigot
1) One who is strongly partial to one's own group, religion, race, or politics and is intolerant of those who differ.
2)A prejudiced person who is intolerant of any opinions differing from his own.
bigotry
1)The attitude, state of mind, or behavior characteristic of a bigot; intolerance.
2) The state of mind of a bigot; obstinate and unreasoning attachment of one's own belief and opinions, with narrow-minded intolerance of beliefs opposed to them.
3) The intolerance and prejudice of a bigot
(Source: www.dictionary.com)
Fair description of the gay activist brigade.