My dad had several high school friends who were interned. The Puget Sound area had lots of Japanese-ancestry families, especially in the local farming communities.
His observation was that it was powerfully unfair but that the early-war hysteria was big, and it served a protective purpose to some degree. But that it went on too long, long after there was any question of necessity.
One issue seldom talked about is how neighbors, etc. reacted. Some acted very nobly, farming the land, paying the taxes on behalf of their interned neighbors, and banking rents for them. Others far less so; b