Bach, Brahms, Beethoven and Strauss were forbidden to be played in Milwaukee during WWII. What a loss!
And Wagner and Bruckner I presume...
Are you sure of that? A great deal of this kind of crap occurred during WWI, but a lot less in WWII. Or at least that's my understanding.
I suspect the reason may be that we were fighting "the Germans" in WWI, while in WWII we were fighting "the Nazis."