BERLIN -- I can understand, my German friend said, why Germans voted for Hitler in 1933 -- though he did not receive a majority of the vote. The Weimar Republic was weak and incompetent. The Great Depression had ruined the nation's war-devastated economy. People were bitter because they thought their leaders had betrayed them in the war. They wanted revenge for the humiliation of Versailles. Hitler promised strong leadership and a new beginning. But why did they continue to support that group of crazy drug addicts, thugs, killers and madmen? The historical question remains. I leave aside the question of...