Gingrich
Newt explains who's responsible for mass killings like the ones that occurred at Virginia Tech, and Columbine: liberals. I'm not sure I can even follow his tortured logic, but it's something to do with the dehumanization of video games and Hollywood movies, which are apparently not the fault of the free market system conservatives love but because of something liberals do.

No word on whether liberals are also responsible for the kind of cruelty that would lead a man like Gingrich to deliver divorce papers to his cancer-stricken wife while she's in her hospital bed. Must be the fault of that best-selling Nintendo game "The Asshole", where you get points for having affairs with office assistants, leaving your wife, being a hypocrite, etc.