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Well, so many evil and monstrous crimes have occurred in America, the internment of the Japanese can get lost in the crush...However, I think some sort of argument can be made to justify the government's actions.
People today forget just how viciously racist most Americans were back in those days. Right after Pearl Harbor, intense hatred of the Japanese was widespread, and further whipped up by the media and government.
I think there was a considerable danger of the Japanese being lynched, murdered and otherwise attacked by Americans in one America's usual bouts of hysteria, especially along the West Coast -- and it certainly would have been a black-eye for the nation, especially as it tried to gather support in other regions of the world.
The government may have felt that it would be wise to put the Japanese in "protective custody", AKA concentration camps, to eliminate at least one of the headaches it was facing.
Of course, Americans, especially those who have money or hold government office, never miss an opportunity to cheat their fellow citizens, and the Japanese were shamefully robbed of their property and exploited in every way possible, but that is just the price of enjoying the advantages and freedoms of America and the glories of Free Enterprise, isn't it? After all, once they were released from confinement, the Japanese had the same opportunities to cheat their neighbors as their neighbors had to cheat them! The business of America is business, isn't it?
The government can be faulted for waiting so long to release the Japanese. Once it was obvious that the Allies were going to defeat Japan, war-time propaganda could easily have eased native-born American citizens of Japanese ancestry back into civilian life.
But procrastination and playing-it-safe are the life blood of government and bureaucracy, aren't they?
After all, even today, look at how long it takes the government to make the necessary decisions to keep itself from going insolvent!!
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