“It was unfortunate, but get over it”
That’s a pretty stupid demand to make of these people.
Yeah we put you American citizens in camps, and you or your reletives went on to be some of our best troops, but STFU about it because that was like ages ago?
What benefit is it to perpetually pick at scabs?
From the perspective of your barcalounger, some 75 years after the fact, it may seem unfair. From the perspective of a Country that saw its Navy 'sunk', and the Singapore citadel taken, and our Army in the Philippines captured -- and knowing of many Japanese American citizens that had pledged fealty to their ancestral home and its Emperor (Shintoism) -- internment was not an outrageous position.
And regarding the brave men who fought in Italy - that was clearly seen some two year AFTER the fact of internment. It was not known/or demonstrated at the time of internment. The known data was that a brutal Japanese juggernaut was rampaging through the pacific region - killing Americans - and the Nation was in danger.