“Finally, it must be emphasized that religions, and those who adhere to religious doctrines, may continue to advocate with utmost, sincere conviction that, by divine precepts, same-sex marriage should not be condoned. The First Amendment ensures that religious organizations and persons are given proper protection as they seek to teach the principles that are so fulfilling and so central to their lives and faiths, and to their own deep aspirations to continue the family structure they have long revered.”
That is the majority opinion, not the dissent. The very ruling that gave same sex couples the right to marry, is now also the precedent that makes as you put it "sue happy militant gay activists" waging any sort of court battle against a church for refusing to marry them a virtual impossibility. It is there in black and white. A religious organization cannot be sued for refusing to marry same sex couples because they are protected by the 1st amendment. That is the law, as was ruled today, as incontrovertible as a right to same sex couples to marry before the state.