God didn't forbid same sex couples getting married. And our country wasn't founded on marriage.
There isn't minority trying to monopolize anything, it's just trying to break a monopoly of the majority. That was a founding principle.
You're right. And centuries ago Same-Sex Marriage was certainly allowed, as a scholarly university professor and Chairman of the History Department of Yale, a prestigious university, found out. Everyone should read this scholarly article.
Anthropologist Community - When Same-Sex Marriage Was a Christian Rite
Neither the first, nor 'correct link' link on that livejournal link work to get the original article. But I saved the webpage and put it in my 'things to mess with homophobes heads' dir.
Looking for the original I find references to it by the Jesuits here,
Internet History Sourcebooks Project
"Another Version of a Union Rite
By Nicholas Zymaris [independent Orthodox scholar]
INTRODUCTION [by Zymaris]
This service is a rite of the Eastern Orthodox Church dating from very early times and assuming its present form between the fourth and ninth centuries AD."
And another version here, though still not the original,
WHEN SAME-SEX MARRIAGE WAS A CHRISTIAN RITE1
Only been looking for a few minutes but it seems like the Powers used that thing in one of the Batman movies that scours the internet erasing all trace of you but on the article.