Are you objecting on moral grounds? Not everyone shares your moral views. Or if it would affect you or me, how? I admit, I havent seen both sides of the issue yet.
Certainly most...all that I know of...bakeries (for example) bake cakes for 2nd marriages...where one or both participants were adulterersn (not all, some).
They bake cakes for fornicators....couples living together and celebrating their 'anniversaries', birthdays, etc. And altho some are not aware of circumstances, many are aware...and choose to take their money and ignore the sin.
Where I come from in NJ, Jewish bakeries are highly prized....and they bake wonderful hot-crossed buns for Easter. They bake and prepare food for El Eid, the feast that breaks the Muslim fast of Ramadan.
It is very similar to the civil rights battles and decisions of the '60s...one hundred years after the Civil War....should gays have to wait 100 yrs for 'the right thing?'
However there is a difference between expressing opinion and refusing service based on discrimination.
"Never fear. Him is here" - Captain Chaos (Dom DeLuise), Cannonball Run
Mace Windu: Then our worst fears have been realized. We must move quickly if the Jedi Order is to survive.
"We all of us know down here that politics is a tough game. And I don't think there's any point in being Irish if you don't know that the world is going to break your heart eventually."-Daniel Patrick Moynihan, December 5, 1963