This really doesn't show much or give credit to Walt being a racist or anything and the society in which he lived definitely had a perception of other peoples, but if you watch the Treasures involving the war cartoons. Those were all developed by the Walt Disney company...they were used as propaganda against our foes during WW2 and those films are filled with some of the most racial remarks I've ever seen in cartoons. Now, these films were of course developed for Americans so that they could laugh at the Japanese, Germans and other Communist countries at the time.
One, though I don't remember the title, dealt with American soldiers being over in Japan and the Japanese soldiers were hiding in the grass and the one wanted to shoot the American, but the other told him to wait and to shoot him in back. That, of course is not verbatim, but I couldn't believe I had heard that from a Disney cartoon - it shocked me so much that I laughed because I was in shock from hearing it. The stereotypes in those movies were so strong and I couldn't imagine the military or government having a company develop films like that today.
These cartoons are in no way proof that Walt was prejudice (sp?), because the gov't paid for and wanted those cartoons, but it's almost shocking in this day and time that cartoons like those could and are associated with Disney.
Of course, they are a part of history, and I don't think that any one or anything should be ashamed of it's past and by releasing those, the Disney Company has shown that it is not ashamed of them and not only that, those cartoons allowed for the funding of some of the most (now) beloved cartoons of that generation.