An important question for people from the USA:
What is more important, God or Freedom?
I believe that freedom is the highest good. Everyone should be free to be able to believe whatever they want, as long as they are not damaging others / other peoples freedom.
The problem with gods is, that people who have a firm religious belief, tend to have a desire to impose their god and their god's beliefs on others.
If I want you to be free to believe in your god, I should be granted the same freedom in return.
Conclusion: If the USA would really love and promote freedom, they would allow gay marriage for this is up the the persons it concerns. Even if you believe in a god, you can't speak for him/her/it (not even if you quote the bible, thora or koran for these books have been written, translated and re-written by humans, it is not a first hand source from whatever god it claims to be) for you are not GOD, are you?