The problem for those who assert biblical authority in support of traditional definitions of marriage is that one could with equal validity assert that the lending of money or certain kinds of haircuts are forbidden by God or that slavery and the subjugation of women are authorized by the Lord.
As liberty and intelligence have increased the people have more and more revolted against the theological dogmas that contradict common sense and wound the tenderest sensibilities of the soul.
Every friend of freedom must be as revolted as I am by the prospect of turning the United States into an armed camp by the vision of jails filled with casual drug users and of an army of enforcers empowered to invade the liberty of citizens on slight evidence.