Landmark gay marriage trial starts today in California

It is absurd to call an ancient institution like marriage discrimination against people who don't qualify for it.

Nobody is objecting to homosexual unions that are established spontaneously or with rituals of any sort that don't involve redefining marriage for the state or the whole society.

That's hilarious given that the First Amendment tells everyone that they are free to ignore the First Commandment.

Gen 16:3 And Sarai Abram's wife took Hagar her maid the Egyptian, after Abram had dwelt ten years in the land of Canaan, and gave her to her husband Abram to be his wife.
Gen 16:4 And he went in unto Hagar, and she conceived: and when she saw that she had conceived, her mistress was despised in her eyes.
Gen 16:5 And Sarai said unto Abram, My wrong [be] upon thee: I have given my maid into thy bosom; and when she saw that she had conceived, I was despised in her eyes: the LORD judge between me and thee.
Gen 16:6 But Abram said unto Sarai, Behold, thy maid [is] in thy hand; do to her as it pleaseth thee. And when Sarai dealt hardly with her, she fled from her face

Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.

jar writes: They were not just allowed to continue polygamy, according to the Bible God even commanded it.
When Hagar left Abe acauseof Sara got in her face and dissed her, God stopped her and commanded she return to Abe.

Gen 21:8 And the child grew, and was weaned: and Abraham made a great feast the [same] day that Isaac was weaned.
Gen 21:9 And Sarah saw the son of Hagar the Egyptian, which she had born unto Abraham, mocking.
Gen 21:10 Wherefore she said unto Abraham, Cast out this bondwoman and her son: for the son of this bondwoman shall not be heir with my son, [even] with Isaac.
Gen 21:11 And the thing was very grievous in Abraham's sight because of his son.
Gen 21:12 And God said unto Abraham, Let it not be grievous in thy sight because of the lad, and because of thy bondwoman; in all that Sarah hath said unto thee, hearken unto her voice; for in Isaac shall thy seed be called.
Gen 21:13 And also of the son of the bondwoman will I make a nation, because he [is] thy seed.
Gen 21:14 And Abraham rose up early in the morning, and took bread, and a bottle of water, and gave [it] unto Hagar, putting [it] on her shoulder, and the child, and sent her away: and she departed, and wandered in the wilderness of Beersheba.
Gen 21:15 And the water was spent in the bottle, and she cast the child under one of the shrubs.
Gen 21:16 And she went, and sat her down over against [him] a good way off, as it were a bowshot: for she said, Let me not see the death of the child. And she sat over against [him], and lift up her voice, and wept.
Gen 21:17 And God heard the voice of the lad; and the angel of God called to Hagar out of heaven, and said unto her, What aileth thee, Hagar? fear not; for God hath heard the voice of the lad where he [is].
Gen 21:18 Arise, lift up the lad, and hold him in thine hand; for I will make him a great nation.
Gen 21:19 And God opened her eyes, and she saw a well of water; and she went, and filled the bottle with water, and gave the lad drink.

Indeed, so far from him openly disapproving of polygamy, he set special blessings on such polygamists as Abraham, Jacob, David, Solomon, without even mentioning to them his preference for monogamy ... no-one would ever have guessed that he was secretly disapproving of their marital arrangements.

It doesn't have to be said in so many words for us to recognize sin in God's people, you simply have to know what God commanded and when they violate it you know they are in sin.

God also called David a man after His own heart although David not only committed polygamy but seduced the wife of one of his loyal soldiers, then had the man killed to cover his tracks.

Nobody is objecting to homosexual unions that are established spontaneously or with rituals of any sort that don't involve redefining marriage for the state or the whole society.

marriageMAR'RIAGE, n. [L.mas, maris.] The act of uniting a man and woman for life; wedlock; the legal union of a man and woman for life. Marriage is a contract both civil and religious, by which the parties engage to live together in mutual affection and fidelity, till death shall separate them. Marriage was instituted by God himself for the purpose of preventing the promiscuous intercourse of the sexes, for promoting domestic felicity,and for securing the maintenance and education of children.Marriage is honorable in all and the bed undefiled. Heb.13.
1. A feast made on the occasion of a marriage.
The kingdom of heaven is like a certain king, who made a marriage for his son. Matt.22.
2. In a scriptural sense, the union between Christ and his church by the covenant of grace. Rev.19.

As for the definition you supplied of "marriage" it's clearly a modern politically correct definition. You might consider Noah Webster's definition from his dictionary of 1828 ...

Murder and adultery were also punishable by death.

What Christ CHANGED was their casual acceptance of the sin of polygamy, by emphasizing God's ordinance, not GOD'S ORDINANCE itself. Sheesh.

Marriage is a Creation Ordinance, established by God, by which a man and a woman become "one flesh" which is expressed in the offspring they create which are literally one flesh out of the two of them. This is said in Genesis 2:24 and quoted by Jesus in Matthew 19:5,6 and Mark 10:8, and by Paul in 1 Corinthians 6:16 and Ephesians 5:31. Although there are certainly conditions that prevent fertility in heterosexuals, they are still by principle able to become one flesh, whereas the rectum cannot conceive a child no matter how much you might wish it.

And what about the tradition of rape? There are clear commandments from god for rape and genocide victims to marry their attackers.

They got punished along with all the other sins committed by David and Solomon, and others too, as I describe above, in the consequences to David's sons and daughters, and the consequences to the nation of Israel as it was split into two kingdoms and had many evil kings.