Political Memes

That's a complicated question without a clear answer. It's hard to establish the motivations of an individual person, but much harder when you're talking about the entire country. Generally, people were united in the war effort, but for a variety of reasons. The NYT downplayed the Holocaust and specifically tried to avoid focusing on antisemitism, in part because they were worried that people wouldn't like the idea of fighting a war to protect Jewish people, as racism and antisemitism were very much present. On the other hand, you had people like folk singer Woody Guthrie who explicitly connected the war to anti-fascism in his songs. But there were also plenty of people and media who had been praising Hitler, before he started invading everywhere.

Basically there were lots of reasons for lots of people to dislike the Nazis, so it's kind of hard to detangle who was motivated by what and to what degree. Generally though, if they had kept to their own borders, it's unlikely that any other country would have invaded them just for being fascists, and many countries went through great lengths not to go to war with them, because nobody wanted to recreate the devastation of WWI. Even then the US wasn't willing to get directly involved until it was directly attacked.