If your deeply held religious beliefs stop you from baking a cake for a gay couple, change your beliefs. If your beliefs were of any value, they wouldn't be preventing you from doing acts of kindness for other human beings.
OR perhaps consider that your assertion that this is a matter of religious conscience is simply an act of self abnegation, designed to fool yourself in to believing that you are NOT a bigoted, evil, hate filled, lousy, horror of a human being not worth being pissed on if you were on fire?
Just a thought for consideration.
The wedding cake for a gay couple in Northern Ireland made a lot of news as the bakers refused to bake it - so it became a political issue -
(political issues here are often settled with dire consequences)
I think its too easy to say "change your beliefs!" they are in a hardened culture which is too difficult to escape from in that easy way of just saying "Change!
Change takes time - It wasnt that long ago that people were killing each other here on the streets for religion.
I know quite a few local bakers who would have jumped at the chance to make a cake for anyone.