It often amuses me that the same people who watch and are entertained by shows like Joe Millionaire, the Bachelor and the Bachelorette -- all of which completely debase and undermine marriage -- are often vehemently opposed to gay marriage. (Apparently it's okay to make a mockery of marriage on national television for the amusement of millions of viewers, but only if straight people are doing it.)
Spiritwalker, I agree with part of your statement, in specific on the semantics or wording of the acknowledgment of the gay/lesbian unions. Perhaps civil-unions are the best real-world solution to this dispute. I'm certainly not a constitutional scholar, but separate is not equal (May 17th, 1954 Supreme Court ruling in the case Brown vs. Board of Education.) Calling one relationship a gay union and another a marriage carries with it both a denotative and connotative disparity in meaning.
As for changing the biblical and historical definition of marriage, I don't think the fundamentalist have a leg to stand on in that regard. Let's not forget the that most of the first biblical marriages were polygamous -- and approved of by god, i.e., Abraham, Solomon, David all had multiple wives.
For the benefit of all you bible-thumpers out there that think I'm making that up, I suggest you read the following verses:
Exodus 21:10
If he marries another woman, he must not deprive the first one of her food, clothing and marital rights.
2 Samuel 5:13
After he left Hebron, David took more concubines and wives in Jerusalem, and more sons and daughters were born to him.
1 Kings 11:3
He (Solomon) had seven hundred wives of royal birth and three hundred concubines, and his wives led him astray.
2 Chronicles 11:21
Rehoboam loved Maacah daughter of Absalom more than any of his other wives and concubines. In all, he had eighteen wives and sixty concubines, twenty-eight sons and sixty daughters.
Deuteronomy 21:15
If a man has two wives, and he loves one but not the other, and both bear him sons but the firstborn is the son of the wife he does not love,
In fact the only place in the new testament that limits the amount of wives a man can have is in 1 Timothy 3:2 & 3:12, and Paul applies those limitation only to deacons and overseers.
Just one more bible quote before I put my bible away, Malachi 3:6 For I am the LORD, I change not;
Does that mean god is still okay with polygamy?
So biblically, is marriage between one man and one woman or one man and many woman? I think the evidence above is pretty clear. As a culture we've rejected the bible's polygamous definition of marriage. So, why are we so timid to allow gays and lesbians to be married?
I think we should endeavor to show tolerance and mercy to these persons. I can't help thinking about what this rather smart guy once said about how to deal with other people: "Blessed are those who mourn, For they shall be comforted. Blessed are the merciful, For they shall obtain mercy. Blessed are the pure in heart, For they shall see God. Blessed are the peacemakers, For they shall be called sons of God."
Sorry if I sermonized, I just think Jesus was a lot more compassionate and understanding than most people give him credit for and that all humans should have equal rights, including the right to marry whomever they love.