The problem is your side IS the defacto standard and IS what is taught in schools.  Look around you and also check out the media.   Try watching TV.   Which values are pushed?  Which group is demeaned as evil and demented?  You are doing it yourself.  I will give you a hint, it is not the side I am pushing.   Also, they refused service to nobody.  All they did is refuse to make an OBSCENE cake.
How about this, in a Muslim restaurant, would you insist that they serve pork?  Or a Hindu India one, would insist on being served beef?   or non-kosher items at a Jewish restaurant? Another one is anything made with yeast during Jewish Passover, from a Jewish bakery? 
BTW, you never answered my question about which side you come down on in forcing pharmacists into helping to commit murder against unborn babies.   Most people from the left say that pharmacists should be forced to carry and dispense items that murder unborn babies.