I saw this post a few days ago. It was all about the Bible “not” saying that marriage was between one man and one woman. The case was presented that because men in the Bible often had more than one wife, and God didn't strike them dead on the spot, obviously God does not mind homosexuality and same sex marriage.
I've rarely seen a more persistent case of “Did God really say?”
In fact, I've only seen it more clearly once – In Genesis 3:1