Since when does serving up junk food give someone a license to preach? Politics and all things fried, fatty and fast are becoming intertwined to the point of absurdity. We’ve got the Papa John’s pizza guys weighing in on the health-care debate, while the burger slingers out west at In-N-Out can’t serve up a cheeseburger without a Bible verse. The craziness of fast-food commentary on social issues became obvious to me when I stumbled into a totally earnest discussion at a party last week by a bunch of Washingtonians who personally support the right to same-sex marriage, but are also...