Many (though by no means all) liberals don't see liberalism as an ideology, but rather as plain old human decency and common sense. Daily Kos blogger Ed Martin took that viewpoint to an extreme this past Tuesday.
Martin doesn't think Republicans are qualified to call him and his ilk liberals. He wonders, "Why should any rational person allow themselves to be defined by people who have been wrong about everything?...[P]eople who proudly demonstrate their pathologies, sociopathy and psychopathy, every day."