It skews their whole world view and their "religion" as well. The philosophy of a liberal is basically humanistic--and that we are our own gods. They have embraced "minorities" (women are a majority with 52% of the population), African-Americans, and other races as a means to achieve moral superiority.
Liberals needs a sense of "moral outrage and justification" because they know in their heart of hearts they have none. They bless homosexuality, coveting thy neighbors goods, and abortion. If you reject God's law, then you make up your own.