The general American populace didn't even trust the
Japanese-Americans after what happened to Pearl Harbor. All sorts
of wild accusations came out that they had acted as ground spotters
for the Japanese Zeros, spied for the Japanese, etc, etc....
After Pearl Harbor, the Japanese-Americans were interned in
concentration camps... even those who were 2nd generation
Jap-Americans who were born on US soil. Not as bad as what the
Nazis did, but denying freedom to innocent human beings is still a
crime against humanity. I think FDR himself signed the executive
order.
The creation of the 442nd All-Nisei Regiment was supposedly to
atone for their 'sins'.
I find it heartening that they were the most-decorated US combat
unit in WWII... goes to show the triumph of the human spirit
against adversity.