My first flight instructor flew Me-110s for the Reich during the war.
...............so, in your piece of the world on this subject you obviously moved on and tens of millions on both sides did too following all our wars through Vietnam.
You know, as CRAZY as it is in a literal sense, what sane alternative is there?
That said, I agree with the freeper who said it look creepy (or whatever adjective he used) to see Mattis and this Vietnam General standing together on the Pentagon steps with the Vietnam General saluting the US Flag during the National Anthem. Amazing.