From Mirriam

Bigot: a person who strongly and unfairly dislikes other people, ideas, etc. : a bigoted person; especially : a person who hates or refuses to accept the members of a particular group (such as a racial or religious group)

I wouldn’t use the word “bigot” to describe religious anti-LGBT fundamentalists if they simply don’t approve of things like same-sex marriage. But I would use the word if those same people actively try to oppress LGBT people and deny them equal civil rights.

It is not a nice word. The average fundamentalist is not a practising bigot. But there are some, and they tarnish their religions.

Just sayin’ . . .