Well, sort of. I don't believe that, ontologically, gay "marriage" exists, and I have absolutely no qualms calling homosexual practice sinful, and homosexuality in general a result of the fall. But regarding how Christians should think and vote about it- well that's a harder question for me.
In any case, the progression argument (i.e. legalizing gay marriage will necessarily precipitate legalizing all alternative marriages, such as polygamous marriage) has always seemed compelling. When being in love is the only standard for marriage, why wouldn't folks in other forms of alternative relationships lay claim to that "right"?
Well, in fact, they are. Dan Phillips pointed to this article on polyamory (i.e. groups of three or more in one shared relationship, distinct from bigamy/polygamy in that it is not a cluster of individual relationships- it is all one relationship). Yup, it's really happening. And nope, I'm not surprised. Should the polyamorous continue to clamor for marriage rights, what precedent will be used to stop them?
One more thing: I wonder, I really do, how the mainstream LDS church would respond to the legalization of polygamy. In early Mormonism, polygamy was unquestionably an eternal teaching. It first came from Joseph Smith (D&C 132), and was heavily reinforced by Brigham Young, the second president of the LDS church.
In 1855, Young said, "[I]f any of you will deny the plurality of wives, and continue to do so, I promise that you will be damned." In 1862, he said, "Why do we believe in and practice polygamy? Because the Lord introduced it to his servants in a revleation given to Joseph Smith, and the Lord's servants have always practiced it....[T]his is the religion of Abraham, and, unless we do the works of Abraham, we are not Abraham's seed and heirs according to promise." One more from Young in 1866:
The only men who become Gods, even the Sons of God, are those who enter into polygamy. Others attain unto a glory and may even be permitted to come into the presence of the Father and the Son; but they canot reign as kings in glory, because they had blessings offered unto them, and they refused to accept them...'Do you think that we shall ever be admitted as a State into the Union without denying the principle of polygamy?' If we are not admitted until then, we shall never be admitted.Keep in mind: this would not be like Jerry Fallwell standing up and saying something that many of the rest of us Christians disagreed with. Mormons place enormous emphasis on continuing revelation from God that is literally on the same level of authority as Scripture. This primarily comes from the president of the church, who they consider to be a prophet. So Brigham Young was God's voice when he uttered those words.
And that last quote brings up exactly what the problem became: plural marriage was seriously frowned upon by the American government, but Utah, populated almost exclusively by Mormons, was only a territory. It was never going to achieve statehood as long as plural marriage was upheld. For that matter, anti-polygamy laws were putting many LDS members in prison, including some of their "apostles" (the twelve men at the top of the LDS hierarchy, surpassed only by the president in rank).
When Wilford Woodruff became the president of the church in 1887, there was serious trouble. The Supreme Court ruled five to four in 1890 that the American government could close the church if they continued to practice plural marriage. In that same year, Woodruff issued a manifesto semi-couched as revelation from God that declared his and the church's intention to submit to anti-polygamy laws. Thus the church's official renouncement of plural marriage. Utah became a state, but it still took awhile before the practice stopped (it actually increased for a time after statehood was reached).
For that matter, Richard Abanes, whose book One Nation Under Gods is the source of my information and generally a fascinating read on the history of the LDS church, notes that not only is the principle of polygamy still upheld as a sacred belief, but it is still practiced by some. Abanes estimates 60,000 LDS fundamentalists (a break-off from the main LDS church) are practicing plural marriage, which is what we normally think of. But he also has good evidence that there are many polygamous Mormons in the mainstream LDS church keeping a low profile living in urban Salt Lake City. Crazy.
All that history to say this: polygamy was most certainly renounced by the LDS church for political reasons. If polygamy had not been outlawed by the U. S. government, and if those laws were not standing in the way of Utah's statehood, then it surely would have remained a part of Mormonism.
Especially since Spencer W. Kimball was president of the church from 1973 to 1985, the major LDS push seems to be to make Mormonism appear to be a reasonable, regular American religion. They want to fit in.
But therein lies the dilemma: even if polygamy became legalized, it still would be a strange religious belief in the minds of most modern Americans. Therefore, the LDS church would likely be reticent to reinstitute it. But all it would take would be one president to declare that God had revealed to him that polygamy should again be accepted, and the LDS church would have no choice but to receive it as God's authoritative word, and practice could pick up.
A rabbit trail, I know, but a plausible one that happens to be of interest to this blogger.