You know what really rustles my jimmies about this?
First of all, the race ratios are wrong. Now, I live in England, so can't speak for America at all.
BUT
When you have any good sized crowd of people, it is basically all white, with several asians, a few arabics, and very few blacks.
Or, if the blacks or arabics are in the majority, the other doesn't tend to show - there'll just be a few whites, and a few asians.
There is never (except maybe centre-London) equal representation of different races.
Secondly, artists fuck about within a family - if your sibling is black, you're VERY likely to be black too. And you wouldn't have one black, one white, and one native American. That would be adopted, not a blood family.
Thirdly - none of the show are shwon to have disabilities. This isn't the same as race, as you can't tell race from coat colour. You could tell if their legs didn't work.
Finally - the villains are always white. ALWAYS.
I'm sick of being depicted as evil. Stop it, you racist minorities!