I will be very clear, pdq. I favor the right of every citizen to engage in any relationship he likes, so long as it involves consenting adults. That means that, if two or more people choose to make a contractually binding agreement, more power to them. Laws against polygamy are as intrusive and oppressive as laws forbidding same sex or interracial unions.
I am, of course, rather libertarian in my views. I do not need my government protecting me from myself, just to satisfy a popular set of standards. By the same token, I have no wish to have my values become Official or the norm. Those gays who wish to change their respective church's stands on homosexuality should not be doing so, through the courts or the congress. They can, always, write out their grievences and nail them to a church door. They will have my best wishes and tacit support.