Almost never mentioned anymore. We also don't talk about how cruel our citizens can be even to fellow Americans i.e..the so called Civil War.
At the start of WW11, It would be impossible to convey to today's Americans the strong dislike between the northerners and southerners, the Catholics and Protestants, blacks and whites, and between ethnic groups.
About the only thing these groups had in common was a dislike for Jews.
WW11 changed that a lot, and interaction with other groups ironed out a lot of these animosities.
Intermarriage mongrelized this country, and made us realize one thing we all had in common was being an American.
That is under attack now from our American hating president, Obama. -tom