Earlier quoted context omitted.
This is entirely supposition on my part, from someone far too young to have lived through any of it, but I suspect it's less that Japanese Americans looked different, and more that Japan was a non-Christian culture, which made it easier to dehumanize people of Japanese descent. The Nazis might have been evil but at least they were "like us" in that they shared a common heritage, religion and linguistic root with Amer…
Do you really believe that it was because Japan is dominantly a non-Christian culture and not because they look different? No, it was because they weren't white. And America has, for a very long time and even now, been painted as a mostly white and african american culture. Even in modern Japan itself ironically enough, it's hard for some people to really picture non-white and non-african Americans as Americans. The…
I believe it was both - they're two sides of the same coin. Look at the propaganda of the time - the Japanese were portrayed as being fundamentally inhuman in a way that Europeans weren't. The myth of the "inscrutable Oriental" has been around in the West for a very long time, the Japanese mind and morality were considered to be incomprehensible.
That Japanese Americans looked different probably made this xenophobia easier to act upon, though.