If you live your life directly by the bible, you're living a life of contradiction. Really.
Plus, we have freedom of religion, expect the Christians (The anti-gay Christians) can stand and say we shouldn't be allowed to be married.
In the Bill of Rights it gives the States the power over their state if it is not stated in the constitution. But yeah. So since we can't get all of America to agree at once, we have to go one stupid little state at a time. *Is grumpy about gay-marriage*