I have seen the tendancy of liberals to act as if they are more enlightened than everyone else.
It has been my experience that as a generalization that liberals tend to master surface level understanding of issues but confuse that understanding to be complete understanding. The personality profile of the typical liberal (again in my experience) is one of someone who has a hard time dealing with details. They don't have the patience to delve into the underlying issues.
When confronted with that complexity, the liberal response is usually very cutting but witty. As if wit and a clever retort are a substitute for true understanding of the issue. Or they'll dismiss a serious issue with a one line retort:
Conservative: The US can't accept the Kyoto treaty because it was crafted to severely damage the US economy and leaves the biggest up and coming polluters like China, India and Russia totally untouched.
Liberal respnse: "Oh, well I hope your precious SUVs can swim, because they're going to need it once the polar ice caps melt."
This type of half-assed intellectualism usually leads to feel-good policies that can do more harm than good simply because the liberals who proposed and enacted it couldn't be bothered to think it out to their logical conclusion.
Conservative: "You do realize that if you pay people to stay at home and have babies that they will stay at home and have babies?"
Liberal: "And your solution was working so well too eh? 'are there not workhouses'?" (see how clever I am? I made a point and quoted Dickens at the same time! Score one for me!)