Just like WWI, Americans had to be massaged, propagandized and manipulated into war.
My Grandmother, who had one brother killed, and another gassed in WWI such that he was an invalid, was firmly against any US involvement in WWII. When the time came, she forced Dad to join the Navy so he wouldn’t be in what she imagined would be another trench war in France.
Josef Goebbels said that he learned the most about how to use propaganda from George Creel's efforts during WWI.