Well I apologize if you do not see how it is funny, so I will break it down. The fact that so many complete morons believe... and I mean truly believe that Disney was an Anti-Semite is ridiculous. As I stated previously, you don't need half a brain to know it was more than likely not true. However, it is well known that Classic disney animations and films were, by today's overwhelmingly smothering standards, racist. Walt himself oversaw the production of most of these films in which black people, native americans, chinese, and jews were often portrayed in a satirical manner. But when Walt was alive, that was the world. There was no need for such PCness. People had thicker skins.
It is funny to think that about the fact that Walt could have been an anti-semite because the idea is so absolutely absurd. I hope that helped you understand