It used to be that women didn't have a say in who they could marry. It used to be you couldn't marry outside of your race. It used to be you could have more than one wife (and in some cases you still can). It used to be you couldn't get divorced. It used to be you could have a few women on the side.
To the state of California - Marriage is nothing more than a contract between two people. And what you are doing is trying to bring God into the discussion. But the question is who's God. The Jews have different rules for marriages (and divorce) than Evangelicals, and Muslims, Catholics have much stricter requirements. I'm fine with letting religions define marriage and divorce as long as it's the Catholic religion, any other religion is an affront to God's will and the state should not sanction it.
Customs of that supported arranged or prohibited inter-racial marriage do not redefine “marriage” at all.
While it is true that the Bible states God defined and performed the first marriage, the custom is so ingrained in human experience that marriage is an institution in societies far removed from any knowledge of God. In the very heart of animism or polytheism we find marriage only defined as between a man and a woman. Even in polygamous societies when a man made reference to one of his wives, nobody would dream it would be another man.
Now, someone may be able to provide a cite to other cases, but the overwhelming weight of social norms throughout recorded history is irrefutable.