not any more than it supports you marrying your yourself, or your pet, or your pencil.
God is the one that created the two different sexes and God is the one that created the institution of marriage between the sexes. And God is the one that placed human sexual relations within the context of marriage.
He didn't create a marriage among the same sex. And he went on to condemn human sexual activity outside of the context of a heterosexual marriage.
these are facts no HONEST reader of the bible can deny
*sigh* someone stopped trying to learn about Christianity in grade school . . .
Leaving aside the debates about whether or not the bible is the word of God, or whether it is to be taken literally, or whether it has been mistranslated over the years, or whether your reading of those translations is anywhere near accurate, simply put: Christianity's view of marriage should not be the basis of modern social arrangements in a pluralistic, mutli-faith society.
There is a multitude of beliefs and traditions about marriage in the U.S., many of which embrace or have embraced same-sex couplings. Requiring adherence to a narrow reading of one religion's texts is disrespectful to the diversity of the U.S. citizenry.
Also, because I can't resist this, the fables you outlined as being the basis for *your* rejection of same-sex relationships are only one part of a complex and contradictory set of prescriptions and proscriptions about sexuality from the bible. I suggest you read John Boswell's 'Christianity, Homosexuality, and Social Tolerance' as a reference. Christianity has a long history of embracing same sex relations and relationships stretching from its earliest days to the early modern period. The prohibitions against it are either Talumdic (therefore not required for Christians, as per the decision of the Council of Nicea) or apostolic (originating from the writings of people like St. Paul and St. John - thereby not the word of God, but of man).