We defeated Hitler - you know the guy who massacred 6 million Jews - but managed to not communicate about the Germans post war in this manner
We rounded up German and Japanese Americans and put them in camps, some were still there as late as 1948. We even gathered up Germans in Latin America and put them in US camps. There were no apologies or reparations. So basically the American government did the exact same thing as this two young women were suggesting.
Anti-German sentiment was strong during and after WWI and II. Germans were ostracized, German Americans anglicized their German surnames, institutions were attacked and condemned, place and food names were changed, etc.
The Cold War shortened some of the post WWII stuff because we were aligned with West Germany against communism