Of course FDR was a racist. American war propaganda was racist as well.
Dr. Suess explicitly supported putting the Japs in concentration camps in his cartoons:
http://www.tofugu.com/2013/02/20/dr-seuss/ (scroll about 1/3 down).
http://en.wikipedia.org/wiki/Anti-Japanese_sentiment
http://en.wikipedia.org/wiki/File:Anti-Japan2.png
A review of the facts of Japanese behavior in places like Nanjing and Bataan makes the anti-Japanese sentiment understandable. It doesn’t excuse putting American citizens in concentration camps.
I have a pretty good collection of Loony Tunes from the day. Racist? You bet, but I still laugh myself silly watching them. I guess I’m just insensitive.