When I asked my 3rd generation Japanese-American in-laws why they they all vote dem, when FDR interned their mother at Manzanar, all I got was blank stares.
His answer: "Political parties change over time. The republicans used to be for individual freedom. Now all they do is try to impose their morality on everyone."
He didn't really answer my specific question, but it did reveal the mindset of Japanese-Americans in 2012.