Interesting point.
There's great value in working to live in better harmony with all creation. But I think there's a tremendous difference between a person who - for example - takes life because it gives them some sort of twisted satisfaction (true psychopathy) and a hungry man who kills a deer to feed himself and his family.
As long as there is hunger and suffering among people on a large scale, pragmatic decisions will be made. Note - I'm not attempting to say this is necessarily right or wrong, only that this is the reality we have to address. If you ask a hungry coastal village to stop eating fish, do you think for a moment that will work? If, on the other hand, you develop tools and technologies to help them feed themselves as effectively and make them available, now you have a viable alternative. None of those hypothetical villagers, by the way, are being cruel or psychotic for eating fish. They are simply trying to survive, which is the first instinct of every living thing.
RE: UK Gov. Operated By Psychopaths: Effectively Declares Animal Emotion, Sentience & Pain is Irrelevant