I did a research paper in my freshman year in college about the historically-related films that Walt did. I read book after book, biography after biography, and each one mentioned a bias that Walt had. He seemed to be somewhat anti-Semetic.
But think of the times, and his background...he grew up in the Midwest as a Protestant, thinking like this was engrained in his brain. Another reason he took out his anger on Jewish people was the simple fact that most, if not all of his competition in the film business was Jewish.
I remember a quote from him--someone was quitting to work for the competition, and Walt said something to the effect of "You go work for those Jews, where you belong" in a Yiddish voice. Also, in The Three Little Pigs, the wolf dresses up as a Rabbi and puts on a Yiddish accent at one point--some people considered that to be anti-Semetic. I also read that he didn't hire Jewish people, or African-Americans.
(I think someone asked if he was a Republican or Democrat--he was very very conservative.)
In the end, I concluded that he was a visionary and an inspiring individual. Of course he has flaws, and a handful of them, but that almost seems to add to his intrigue as a very complex person. Not to say he was sneaky--he was actually naive at times, and was taken advantage of, but to me, that only makes him more appealing. Most people like to look at him and think he was a simple, good ol' boy--but he was much more complicated than that.