"The Christian right in America, like all organized religions, claims to have a correct and exclusive understanding of God's will. To hear them tell it, the almighty creator of the universe has strong opinions about corporate tax rates, firearm ownership and what consenting adults do with their genitals, and he's delegated them to speak on his behalf.
But if they want us to believe they have this authority, it seems only fair to consider their track record. After all, the Bible itself tells how to identify false prophets, saying that if they're not really speaking for God, their predictions won't come true -- a very sensible test!"