I also began to understand why the American culture wars involved so many battles over sacrilege. Is a flag just a piece of cloth, which can be burned as a form of protest? Or does each flag contain within it something nonmaterial such that when protesters burn it, they have done something bad (even if nobody were to see them do it)? When an artist submerges a crucifix in a jar of his own urine, or smears elephant dung on an image of the Virgin Mary, do these works belong in art museums? Can the artist simply tell religious Christians, “If you don’t want to see it, don’t go to the museum”? Or does the mere existence of such works make the world dirtier, more profane, and more degraded?

Jonathan Haidt, The Righteous Mind.

The Righteous Mind has been around for a while. Do our culture wars still fit this pattern — taking offense that the other side is profaning something sacred?

What are the sacred cows of (in broad strokes) American progressives versus American conservatives these days?