Green Eggs and Ham wasn’t banned. Why doesn’t he sign one of the four banned books? Also, what are the names of the banned books and what is the offending material?
Rebel News has a page with an embedded video with the banned images.
One from the Mulberry Street book had "a Chinese man who eats with sticks". A Seuss caricature? Yes? Racist? Not that I could see. I don't expect one Dr. Seuss picture to fully explore Asian rice agriculture, culinary practices and eye shape. Otherwise you would have to say every Japanese manga or anime with caucasians with overly round eyes is racist and must be burned.