No. They have a first amendment right not to. It's explicit in this abomination of a ruling.
You are a fricken FOOL. Oh, I apologize... you just have not been issued the latest SCOTUS dictionary and are misreading the meaning of words.
Yes, they cannot force them to marry as they are not a business, but I am pretty sure they can prevent the pastor from preaching against homosexuality from the pulpit. I say that because they are doing it in Canada. I think there have been huge fines and imprisonment for pastors that preach Romans 1.