Which statement explains why the American public reacted differently to the formation of the United Nations than it had to the formation of League of Nations? The end of World War II did not result in the same isolationism in the United States that had resulted after World War I. The United Nations was supported by all of the Allies, whereas the League of Nations had been opposed by most of the Allies. The American public was more concerned about communism after World War II than it had been after World War I. The United States was not expected to contribute as much money to the United