What is the theme in Berlin Diary; the Journal of a Foreign Correspondent, 1934-1941 by William L. Shirer?

One of the dominant themes of the book is Hitler's tactics. The Nazi regime practices management of the news through its Ministry of Propaganda. The German people are told what Hitler and his circle wants them to know. This is usually not the truth. The German news never portrays Germany as the aggressor even though Hitler usurps country after country. Hitler tells the target country his terms and if they did not agree to them, the Germans will invade. Most countries yield to his demand without a fight.