It's all about appearances. The dems want to appear to support stable families and responsible fatherhood, but the mother's milk of liberalism is dependence upon big government. Stable families and responsible fathers are anathema to the true goals of liberals: substitution of government for "Daddy" and "husband."
To the liberal, “religion” is supported by four pillars:
1. The democrat party is the mosque of worship.
2. All ideology springs from the sharia of marxism.
3. There is no god but the State.
4. Obama is its prophet.