Interesting story. Normally, it's hard to find a copy of the book, but there it was at Walmart. Sounds to me like some anti-semitic employee was responsible for adding it to their short list of books that Walmart sells.
That's too bad for Walmart, IMO.
I guess Walmart isn't in the business of specialty books, so this isn't a major problem. However, I would not propose that we burn this book, for example. It ought to be showcased and studied meticulously for the propaganda it is.