It seems this is part of a trend where Churches (including the Mormon Church) are no longer going to try to organize to block the state from recognizing any same-sex marriages at all (which was the dominant viewpoint 10 years ago) — rather, they’re willing to stand aside and let gay people get married, so long as it isn’t happening under their pews.
It’s a compromise, but it doesn’t sit easily with me. Using religion as a fig leaf to cloak bigotry and to justify discrimination is disgusting, and there’s no sensible reason to carve out exceptions for religions that aren’t available to other kinds of groups and businesses. It gives an excuse to bigots who otherwise don’t have a spiritual bone in their body to cloak themselves in religion, and sully the whole enterprise.
However, I do welcome the idea that religions are no longer trying to force their same-sex marriage beliefs onto others. If you don’t like what the Mormon Church thinks about this, then you can simply leave. And many do.
All that said: Many organized religions are tacking just as hard in the other direction on abortion, telling women who aren’t part of their church and don’t share their beliefs about when life begins that they can’t have one. That idea is getting thrashed in the polls and I expect will continue to be.
Bottom-line: If you don’t want a gay marriage, don’t have one. And if you don’t want an abortion, then don’t get one. But don’t go thumping a Bible at me telling me how to live my life, or you’re gonna have a problem.