1. Every American President quotes verse at some point to support their position. Are you really going to argue that Bush or Bush or Reagan didn't? Give me a break.
2. He's not saying that the golden rules supports gay marriage, he's saying that people like those who actually think the recent NC amendment is reasonable might want to apply it and treat as others as they want to be treated. If you don't want gays married in your church, fine. But the laws of this country or any state shouldn't be denying American citizens rights based on The Bible or any other religious book.