What an interesting discussion!
I think there's another part of this that has entirely to do with the art side of animation. An eye is an eye, right? Everyone draws an eye differently, but enough alike that we can all recognize it as an eye. So why is that?
Because a drawing of something is a symbol of something. It's a representation. Which is always open to interpretation.
I think of it that yeah, I see Caucasians when I watch anime, and I see impossible hair, eye, and skin colors. Not only are eyes blue, but they're a blue that put Crayola to shame. Anime was, once upon a time, patterned after Western animation, and that background will never go away. Not having ever worked in the Japanese animation industry, I have no clue if it's a given that the characters have to look Caucasian.
But I also think I see Caucasians when I watch anime because I AM Caucasian, from Caucasian background surrounded by other Caucasians. It's what I know, it's what my eye is used to seeing. So when I see this representation of humans in cartoons, then I associate the symbols with my Caucasian heritage.
Yeah, if that made sense, kudos to me! I'm a bit sleepy . . . hee.
~ Deadly Whispers