After what Obama is doing to Catholic Churches and hospitals about insurance coverage, I have no doubt that the left would force churches to perform Teh Ghey weddings or remove their tax exempt status.
Coming round about here to the unthinkable, Churches forced to allow Satanists to demand a black wedding with the Crucifix upside down in any church or Temple they choose, just to piss on others beliefs.
I can imagine the thrill of the unholy turning a Christian Church into a arena to perform the rites of Satan.
This will also cover Synagogue's that must allow Neo Nazis to demand their rites be preformed in their Temples.
Muslims will be the last to allow desecrating of their Houses of Worship by others.
All faiths have the RIGHT to keep non believers and trouble makers away from their DOOR. When Churches are forced to accept non believers into their home, forced to desecrate their faith by allowing their faith to be perverted by outsiders performing acts that go against their faith, Now What ????
In the long run I see this a future attack on the Free Masons and the religious groups that keep their secretes close to their vest. The rights to associate with like kind are eroding step by step.
If Gays wish to "Marry" let them build their own Church's, no problem there. Just not expect them to desecrate the faiths of others on demand or by LAW.