Rose is a sweet lady who has lived down the hall for longer than the 15 years I've lived here. She's a conservative Christian who, this year, will be voting for Obama but says she's going to vote Yes on the Minnesota Same Sex Marriage Amendment, defining marriage only as between one man and one woman. We have been trading Biblical citations in support of our positions. She's fond of saying, "Hate the sin, love the sinner." That's all well and good if there were sin involved, and if this were a religious discussion, but this is a civil matter and the Bible comes pretty hard on the "love" part. Here is my list, fairly quickly cobbled together for her but somewhat expanded and with links for the web.
Quotes are from Biblos, King James Bible translation because I thought it would be more convincing to Rose.
Jesus says nothing of hating gays, but talks much of love:
"Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law. For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself. Love worketh no ill to his neighbour: therefore love is the fulfilling of the law."
Jesus was big on forgiveness and turning the other cheek. While I think there are limits to loving thine enemies, it's clear that you can only call yourself a follower of Jesus if love your neighbors who are following the Commandments, with love being the prime commandment.
Some Bible (ie Old Testament) commentary on marriage:
Rose and others who cite the Bible like to quote Leviticus, which does indeed have a lot to say about marriage. Most often cited:
Amongst other abominations in Leviticus:
[In other words, not keeping kosher is as much an abomination as homosexuality]
A couple of more from Leviticus:
Lev 20:9 "For every one that curses his father or his mother shall be surely put to death: he has cursed his father or his mother; his blood shall be upon him."
Lev 24:16 "Whoever blasphemes the name of the LORD shall surely be put to death. All the congregation shall stone him. The sojourner as well as the native, when he blasphemes the Name, shall be put to death." [Was Pat Robertson stoned to death?]
Okay, back to the New Testament on marriage:
The Bible is kinder to women than the New Testament, though that's relative.
1 Corinthians 14:34 "Let your women keep silence in the churches: for it is not permitted unto them to speak; but they are commanded to be under obedience, as also saith the law."
Conclusion: The Bible and the New Testament say a lot about marriage and sexual relationships, but drawing any single conclusion is specious. The moral relativists want strict adherence to one passage but completely ignore others. Their Biblical logic is flawed. Marriage is a civil matter as much as a spiritual bonding, and if you're not going to support love then you must support the contract.
Personal observation: We are created in G_d's image. It's a grave mistake to create G_d in our image. There's much that we don't know. What we do know is that virtually all religious figures, notably Jesus, want us to be nice to each other.