In crude Marxist terms, liberals have a theory of infallible government that is constantly at war with the reality of life.
We are a species that must try to impose and find systems - systems of thought, ways of organizing and categorizing reality.
Keep in mind that Eric Alterman is media critic for The Nation-a hysterically left-wing magazine dedicated to the proposition that corporate America, U.S. foreign policy and the Republican Party are criminal, racist or both. The simple reality is that, for him, the Democratic Party is far too conservative.