Another history lesson for you because you sound like an ignorant loudmouth: Yes,
the United States did not enter WW 2 when England and France declared war on Germany. The reason was because after the horrible and unprecedented casualties of World War 1, American society did not want to get involved in the European slaughter again. Americans at the time felt strongly that if the Europeans want to constantly fight and kill each other then let them without getting Americans killed. This was know as the American Isolationist era, and one of Franklin D. Roosevelt most prominent campaign promises was not to involve the USA in European fights. He constantly repeated this promise in his speeches. Already it was obvious another fight was brewing in Europe. However, as the war progressed, it became apparent to the political and intellectual elite in the USA that outside conflicts can have an effect on USA's national security. External conflicts cannot be ignored and the USA must take an active role in confronting threats before they reach America's shores. However, FDR made a promise to the American people to remain neutral. FDR became involved anyway however by protesting the actions of Japan and Germany and proceeded to seize Japanese bank deposits, and halt any shipments of critical supplies. Japan from then on considered the US a participant in the war and the attack on Pearl Harbor was planned.