VIDEO: After Arizona Killing Keith Olbermann Takes Aim at Palin, Politicians for Cross-Hair Promotion

'We need to put the guns down ... [and] the gun metaphors away," says the political commentator.

Following the shooting of Arizona Rep. Gabrielle Giffords on Saturday, Keith Olbermann urged politicians to put an end to their use of "imminently murderous" rhetoric on a special edition of MSNBC's Countdown.

"We need to put the guns down," he opined. "Just as importantly, we need to put the gun metaphors away, and permanently."

In addition to calling out politicians guilty of using hostile rhetoric, he implicated a map on Sarah Palin's website featuring cross hair symbols over Giffords and 19 other Democrats who voted for health care reform, demanding that she "repudiate her own part … in amplifying violence and violent imagery in politics" or be dismissed from politics.

Olbermann continued by apologizing for a previous remark he'd made that could have been misconstrued as a call to physical violence, and urged the audience to use his apology "as a means to recognize the insidiousness of violent imagery ... [and] how easily, how pervasively, how disastrously it can slip into the already violent or deranged mind."

Watch the video of Saturday night's "Special Comment" below.