I don't support gay marriage, straight marriage, plural marriage, or any other kind of marriage. I don't want the government recognizing marriage at all, because what the government recognizes, the government regulates, and the last thing I want is the government's snotty nose in my bedroom or anyone else's. As far as I am concerned, the government should not be in the business of subsidizing lifestyle choices, which is exactly what it does when it confers tax advantages on the married at the expense of the single. Marriage should simply be regarded as a private contract between people and should not require government sanction of any kind. Conducting marriage ceremonies should be left to private organizations -- or the spouses themselves -- with the government intervening only in cases of fraud or coercion. That means if a Catholic priest wants to refuse to preside over a marriage between two men or between a man and his second wife, so be it. If a Unitarian minister wants to bless the union of two women or preside over a polygamous ceremony (as one did for us), that is her prerogative. If a pagan priestess wishes to celebrate a polyamorous marriage, she is free to do so. As long as no deception or other criminal activity is taking place, there is no reason for the government to even take notice of a private arrangement.
All the noise about tax and insurance complications is foolish blather and purely a diversionary tactic. People should be taxed at the same rates whether they are married or single. Insurance companies have found ways to insure the most bizarre of situations; an unconventional marriage is tame by comparison.
So it could be said that I hew a pretty libertarian line on this issue.
That being said, I refuse to support the gay-rights movement, not only because I don't think the government should be involved in marriage, but also because the gay-rights movement has stabbed the polygamy-rights movement in the back. With few notable exceptions, gay rights advocates, instead of recognizing that the two movements make natural allies and resolving to work together, have made a pathetic ploy to attain some measure of legitimacy by proclaiming to the world that they want nothing to do with polygamy and really want to be good little monogamists. Of course, even among gays, polygamy would always be a fringe lifestyle choice, but that doesn't change the fact that one can hardly be justified in demanding tolerance for one's own lifestyle at the expense of another alternative lifestyle. As long as the gay movement in general continues to exhibit this petty parochialism, I won't do anything to advance their cause. I am not saying I will do anything to impede or oppose it -- I just won't be wasting any of my time or money on such a bigoted group.