Chris Mooney's psychoanalysis of conservatives and token couching of liberals leaves a lot to be desired. I think one might fairly say of both that authoritarian is as authoritarian does. It pays to look past their fratricidal squabbling to see what kinds of things they do with their political power and it's useful, additionally, to look at how they justify them.
In the world outside their squabbling and willful stupidity, liberal legislators just authored and sponsored indefinite detention legislation and a liberal president signed it into law. There's an extensive history of the ways in which previous draconian laws were used. None of it is pretty. The liberal reaction is to claim conservatives would be worse. Narcissism of small differences, anyone?