The secular left is focused on self and seeking pleasure.
It is a part of the culture war in differences on understanding the role of religion in society ("Church and State"), the homosexual agenda, and the lack of will to back school vouchers (no kids, no worry about schools).
Common sense is seriously lacking on the part of liberals. Why we would even need to explain to them why school vouchers are good (vice property taxes to pay for public schools)is evidence. :)