Numerous US anti-Semites and anti-communists during the 1930s, notably within the Mothers' movement led by Elizabeth Dilling, also opposed World War II on the basis that it would be preferable for Nazism rather than Communism to dominate Europe.[13] These women also wished to keep their own sons out of the combat US involvement in the war would necessitate, and believed the war would destroy Christianity and further spread atheistic Communism across Europe.
Henry Ford also opposed US participation in the war until the attack on Pearl Harbor and refused to manufacture airplanes and other war equipment for the British.[14] Father Charles Coughlin urged the US to keep out of the war and permit Germany to conquer Great Britain and the Soviet Union.[15] Asked Coughlin, "Must the entire world go to war for 600,000 Jews in Germany?"[16]
Isolationism was strongest in the United States, where oceans separated it on both sides from the war fronts. The German-American Bund even marched down the avenues of New York City demanding isolationism. The isolationists, led by the America First Committee, were a large, vocal, and powerful challenge to President Roosevelt's efforts to enter the war. Charles Lindbergh was perhaps the most famous isolationist. Isolationism was strongest in the Midwest with its strong German-American population.
In the US, organizations like the American Peace Mobilization and veterans of the Abraham Lincoln Brigade protested in opposition to the war, conscription, and the Lend-Lease Act. They said of Lend-Lease, "Roosevelt needs its dictatorial powers to further his aim of carving out of a warring world, the American Empire so long desired by the Wall Street money lords."[17] Students at UC Berkeley in 1940 led a large protest in opposition to the war.[18]
The Communist Party opposed the United States involvement in the early stages of World War II (until June 22, 1941, the date of the German invasion of the Soviet Union).