There was mutually profitable trade between August of 1939 and June of 1941. Less than two years. And France, England and America have been trading with Germany since the very end of WWI. Actually, it was exactly the reason of the ressuraction of Germany. If they were keeping Germany under control, or even didn't destroyed system of the collective safety in Europe (based on the alliance England-France-Czechoslovakia-Russia) - the WWII wouldn't happened. But they (especially Brits) decided that "Strong Germany means Strong, anti-Bolshevick Europe" and betrayed their allies.