The real key is that many of those interned were American citizens. Many were undoubtedly loyal Americans. I believe J Edgar Hoover was of the opinion that the internment was not necessary, that he could track any Japanese Americans who were engaged in espionage.
Actually, i was responding to someone else's question about how did the Japanese repay the people they interned... and often killed.
Yes, almost all were American citizens, 99.9% were patriotic citizens who had their businesses, assets, etc. confiscated. This thread should die.
Another good point is that, unlike with slavery reparations, the internees were still alive and around to be actually repaid, not their distant descendants.