Idealism rarely motivated people to fight, especially in large numbers for a long time.
American nationalism is what won the above examples.
It wasn't idealism. Japan bombed Pearl Harbor. Are you saying there was no motivation for revenge after Pearl Harbor, that it was nationalism? Is that what you are saying? Really?
The reason that people from the midwest, or the american south, or the north eastern states, cared about people in Hawaii, being bombed was because of NATIONALISM.
They were seen as fellow national citizens, thus the desire for revenge for something that happened to other people far away.
And yes, that is what I am saying. Save your rhetorical drama for someone that cares.