I don't understand your hate. You hate him because his message has been consistent for 25 years?
Edit: full disclosure. I met Mr. Moore in 1998. He generously gave his time to speak to everyone that wanted to speak with him. He gave out personal contact information to some community organizers, and really seemed interested in helping a bunch of us kids who were trying to change the world. I really respect him a lot.
Just because the company making money off of purchasers says it's good for cats. Doesn't mean it's good for cats. Other than one study that relied on surveyed answers from vegan pet owners, I haven't seen any evidence that a vegan diet is safe for cats.