Before anybody mentions the war, remember America was happy to sit back and allow Hitler to take over most of Europe until 1941 when the Germans and Japanese made things a bit more personal. Poland, Finland, Denmark, Norway, France, Belgium, The Netherlands, East Africa, North Africa, Egypt, Romania, Greece, Yugoslavia, The Soviet Union, Czechoslovakia had all been invaded. Hitler even had to declare war on America first to get a response from them.
Not really the actions of a "great" country I would have thought.
They teach this in Americans schools don't they?