When I saw people painting over the mural of former Philadelphia Mayor Frank Rizzo last week, I felt a lot of different emotions. Anger, mostly, at the destruction of a tribute to a man who, although imperfect, devoted his life to the city of his birth. A man who integrated the police force. Who was beloved of many in the black communities he helped keep safe from the drug scourge. A man who made enemies, and friends who’d take a bullet for him.