OK. This is long, but good. Michael Schulson writes at Religion and Politics:
The people I know are ecumenical in their religious values. But, rightly or not, they are dogmatic in their political commitments.
While this experience is not universal, I also do not think it is unique. Social science research about American society supports that hunch. In a lot of ways, the country seems to be getting less religious, more pluralistic, and more tolerant. But at the same time, partisanship is coming to look more and more like a muscular, tribal—almost religious—kind of identity.