Wouldn't surprise me if some of them cheered their Islamist-sympathizing, commie asses off on 9/11.
I know for a fact that a lot of liberals, if not exactly "happy" about the attacks of 9/11, not only felt that America deserved them but that they were somehow justified by our actions in the middle-east. This poll is further proof (as if any were needed) that liberals hate America.
However, the vile creatures that inhabit the ultra-liberal indymedia sites were happy about the attacks. And while in 2000, they opposed Bush or Gore, many supported Kerry in 04. This is a good example of the kind of defective thinking that goes on in the left.
I abandoned my last vestiges of liberalism in the wake of September 11th and I've never looked back.