John Oliver excoriated President Donald Trump for having declined to single out for condemnation a group of Nazis and white nationalists who staged a Unite the Right march in Charlottesville, Virginia over the weekend in protest of a plan to remove a statue of Confederate Gen. Robert E. Lee. One of their ranks deliberately drove his vehicle into a crowd protesting the Nazi rally, killing one and injuring 19 others. “It was truly a weekend of horrifying images,” the…