cats

Sorry, but you've obviously not read the discworld stuff, or at least not enough, nor things about the author.

In this case, what you're seeing is a humorous take that is one of many tidbits about various animals, and is no more or less inaccurate than some of the dogs in the stories. Everything in discworld is a little rough around the edges because of the society he's mimicking. The two main cats in his books, Maurice and Greebo (pictured in the post) both save the day quite capably.

Death, a major character in the series, is a known cat lover that takes a dim view of anyone harming cats. Which is more indicative of the author's real views than an out of context quote from a work of fiction.