After WWI, many Americans wanted to avoid another conflict and preferred to focus on recovering from the Great Depression. IIRC, there was a strong pacifist movement, and people felt safe behind the Atlantic and Pacific Oceans. Additionally, ethnic ties to countries involved in the war also influenced opinions, and political leaders were split on the issue. Good ole fashoned newspapers played their role too, spreading both isolationist and interventionist views. THis all led to a nation unsure whether to stay out of the growing conflict or prepare for the worst. Of course, then the Japanese grew a huge pair and the rest is history.
No one is thrilled with the prospect of offering are youth to die in another continents war until it clear cut its a necessity for national interests.
