Japanese-American citizens are, as the name suggests, American citizens, and aren't answerable to the crimes of the Empire of Japan, and so the actions of the Axis powers aren't germane to the discussions.
Yes and that's the biggest tragedy of this whole situation. However, Chinese and Korean Americans certainly didn't think so along with the rest of the American society. You can't fault them for the connect they saw as you see how much Muslim Americans are vilified along with Sikh Americans who are incorrectly associated with Islam.
