One of the problems with today's lefties is that they are religiously illiterate. In other words, they have no clue that the civilization they now enjoy is largely built on premises and foundations they claim to despise. Here's a nice bit from Michael Novak (who does know a thing or two about religion):
"For instance, La Repubblica (Nov.7), which I read on the plane, carries a front-page jump column by Eugenio Scalfari, its founder and publisher, under the title "Why We Cannot Call Ourselves Laicists." After confessing his own secular creed — the creed of the Enlightenment and the great principles of liberty, fraternity, and equality — he writes that this does not end the matter. He notes how the Christian idea of a duty to the most needy and vulnerable has undeniably influenced his creed, and how the Christian idea of giving to Caesar what is Caesar's, and to God what is God's, is a necessary barrier to totalitarianism both Left and Right. The history of the European secular mind cannot be described simply as laicist, he insists, for it also includes a crucial source of light absorbed from Christian faith."
If you need help decoding, "Laicist" means uber secular. There are a few who realize that Christianity is deep in the mix of Western civilization and that Elton Trueblood's Cut Flower Civilization thesis may well be in danger of fully manifesting itself.