Bigot?

That’s what both Ann at Feministing and Jill at Feministe are calling Rick Warren after hearing the news that he will give the invocation at Barack Obama’s inauguration.

I’m having difficulty seeing anything that resembles an argument in either of these posts for why Rick Warren is supposedly a bigot besides noting that he was in favor of Proposition 8 and is opposed to same-sex marriage.

Have proponents of same-sex marriage reached such depths that anyone who is opposed to same-sex marriage and publicly voices that opposition can be termed a bigot?