First off, let me make it clear that I believe the Japanese internment was a horrible thing that shouldn't have happened. However, though the conditions were bad for the Japanese they weren't bad enough to outright cause the deaths of people. I believe you're misleading the statistics a bit here.
1862 deaths out of a population of 120,313, over the four years the Japanese were interred, is a crude death rate of 16.15 per year; about equal to the United States at the time (not counting the war deaths o/c).
So yes, while the Japanese were horribly mistreated by being put into camps, there's really no evidence that the government's actions led to anyone's deaths (though it was still a horrible horrible policy).
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