Answer:
Leaders in Europe and the United States failed to respond to Nazi Germany's military agression and persecution of Jews and other groups by using excessive force immediately after the first reports of concentration camps came out. The US and European powers should have waited longer before flying over Germany and bombing military bases and the capitol city of Berlin. This brash action taken by the Allied forces was a huge failure and could have created a more large scale world war than what was actually necessary.
Step-by-step explanation: