In Aug. 2012, a left-wing MSNBC aficionado named Floyd Lee Corkins armed himself with a handgun and extra magazines. He drove to the Washington, D.C., headquarters of the socially conservative Family Research Council, planning to shoot it up. Corkins, who later cited the Southern Poverty Law Center for the… Op-Ed: Why Are The Nutjobs Trying To Kill Political Opponents All Left-Wingers?