They're old now - and to counter the feeling of being completely useless & dependent on your care, they're identifying with the more bolder parts of their past.

Let them know you're American -- and if you were around when they were younger men, that you would have enlisted or helped the war efforts. Let them know you pay taxes, and are glad for their service etc. etc. (kill 'em with kindness, is what I'm saying).

PS - there's nothing you can do, deep bigotry is deep and decades old and ingrained. They're not bad people, just old & cranky. As you know. You may in fact, be one of the few 'asians' that they've actually met -- and now, here you are as an authority figure, where they're relying on your care, etc. It's tough for them, to suddenly be your children more or less.

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