There is no "wrong area" for US citizens to live in the United States, and there is NO rationalization for what that criminal FDR did.
There are plenty of wrong areas for US citizens to live, and there is rationalization for the evacuation. With hindsight we can see now it was the wrong decision but at the time the safety of the United States came first, then it's people, including the evacuees.
There was considerable anger being exhibited towards Asians after Pearl Harbor. I say Asians because many Americans could not tell the difference between Chinese and Japanese. Some Chinese put signs up, "I am Chinese."
FDR had turned the safety of the west coast over to General DeWitt and DeWitt wanted the area evacuated. FDR did not have to issue the, but suppose DeWitt was right, suppose there was a danger?
That danger was still felt two years after Pearl Harbor with military installations still being blacked-out along the coast.
All Americans lose some rights in a war, and sadly the Americans of the "wrong background" may lose more.