Who wears the dress?
But seriously, Church of England are excluded from the order, and I imagine others may speak up and refuse due to belief but then people who follow the faiths where it is frowned upon surely wouldn't be in same sex relationships. Why should people who have their choices, same sex, then question others who are against it due to religion?
I personally have no problem with it in the slightest I just think it will cause an uproar as people will see churches as homophobic when they are not.
Basically what everyone else has said.