Is opposition to bigotry itself religiously based? If we were not created, we were not created equal, and therefore do not have any 'inalienable" rights except what the people with the biggest guns see fit to give us.
Thus wedding providers who don't serve gay weddings can only be criticized if they are violated their God-given rights. But either there are no God given rights, in which case there is no case for gay marriage, or they were given those rights by God. But, based on the possible sources of revelation we have, is it plausible to say that God granted gay people the right to marry?