It would be an oversimplification to say that America's culture wars are now between people of faith and nonbelievers. People of faith are not of one mind, whether on specific issues like stem cell research and government intervention in the case of Terri Schiavo, or the more general issue of how religion relates to politics. In recent years, conservative Christians have presented themselves as representing the one authentic Christian perspective on politics. With due respect for our conservative friends, equally devout Christians come to very different conclusions.
Rest of this NY Times op-ed article. This entire piece is well worth reading, especially this incisive paragraph:
In the decade since I left the Senate, American politics has been characterized by two phenomena: the increased activism of the Christian right, especially in the Republican Party, and the collapse of bipartisan collegiality. I do not think it is a stretch to suggest a relationship between the two. To assert that I am on God's side and you are not, that I know God's will and you do not, and that I will use the power of government to advance my understanding of God's kingdom is certain to produce hostility.