Myself, for one. You see, a vast majority of people in the United States, both liberal and conservative, are Christian. Being liberal is generally in support of social progressivism, whereas being conservative is in support of social traditionalism. Many Christians differ on certain opinions, but that doesn't necessarily make them anti-Christians. Most liberals actually are very much in support of religion, it's merely the influence of Christianity in government that troubles them, as the government should be a secular state. It's just the extremist talking heads that are anti-Christian, and you really only see the extremists on both sides in popular culture. Most Americans are fairly centrist and tolerant/apathetic.