While i do agree that some of the earlier instances we have been referring to are insulting to say the least, and likewise unfortunate, i feel that not all of these examples are racist, and we are forgetting that these are "cartoons." In cartoons, we caricature and exaggerate people's characteristics. For example, no one has mentioned the fat mustached singing Tony from Lady and The Tramp. "He's a notta speakin' a english a pretty good?" "whats a matta witha you, i breaka yo face-a?" Why havent we mentioned him? Because he's white?
Not trying to start anything, I'm just saying that, in my opinion, some of these characters (ie Fantasia) ARE racist, but some of them are caricatures (ie Dumbo)