If saying something that makes you sound edgy and like a bit of a tool on social media were illegal Elon Musk would have been jailed many years ago. I have no problem with his opinion. I've seen WAY worse.
"The assumption that animals are without rights, and the illusion that our treatment of them has no moral significance, is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality."