Thank God Fox News is around to remind us how absurd some conservatives can be. On Monday night's O'Reilly Factor, Fox News host Bill O'Reilly's guests included a number of voices speaking about the Trayvon Martin case, in which last month a black teenager walking (presumably home) while carrying snacks one night in Florida was shot and killed by an armed community patrol officer.  The man who killed him - George Zimmerman - claims under the state's "Stand Your Ground" law that the act was committed in self-defense, even though a call to 911 reveals that Zimmerman followed a fleeing…