Tragically failing to learn the lessons of its own programming, the History Channel repeated itself 11 p.m. Sunday, airing Man's Inhumanity To Man: The Horror Of Auschwitz just three days after its initial broadcast. This informative and important Holocaust documentary imparted many poignant lessons last Thursday, Harvard University history professor Dr. Edmund O. Haller said. 'But what has humanity really gained from witnessing The Horror Of Auschwitz if the History Channel ignores its painful lessons and allows it to air again? This is an atrocity that, sadly, could have easily been prevented if we had only learned its lessons the first time.' Haller urged the management of the History Channel to watch its own programming attentively, lest future generations be forced to repeat this dark hour of cable-TV programming. 