Before December 1941, the British, German and French press and public opinion was not very complimentary and they thought of USA:
1. A dangerous country where gangsters walked the streets of major cities carrying machine guns and shooting at policemen. Where the right to carry arms could make any street in any city look like the OK Corral at any moment. Almost every movie that came out of Hollywood confirmed this view.
2. A country that had slumped into economic depression because of its greed and idleness before and after the Wall Street Crash of 1929. There was also a good deal of blame that USA had plunged the rest of the financial world into serious depression, due to its inability to manage its own economy.
3. An immoral country where law-breaking, murder, prostitution and other sexual laxity were everyday happenings. Again, almost all the news from USA was about the moral turpitude of the rich and famous; Hollywood stars, politicians, celebrities on the radio, sportsmen and women, the rural community as well as city-dwellers. Mrs Simpson's "capture" of the Prince of Wales was regarded as "...just what you would expect from America."
BUT a few people in Europe assessed the USA as a major centre of industrial development if only a reason were to arise for such activity. Winston Churchill gambled in his dealings with Nazi Germany that USA would support Britain and France, secretly if necessary. In fact, his planning [plotting?] almost backfired. The USA did not engage in fighting until the war was over 2 years old, and then joined in only because of the attack on Pearl Harbour.
Others, such as Mussolini, Hitler and Daladier accepted the common belief that USA was effete, morally and financially bankrupt, and incapable of influencing international affairs. Until December 1941, they were right.
Since 1945, of course, USA as become the world's latest Empire with influence and colonies all around the globe. Time will tell how long this empire will last because, after all, every empire in history has collapsed eventually; often under its own weak heaviness.
OK?