Proof of an absolute certainty; humans possess the greatest rational ever known – our wisdom as a species is unparalleled. Seriously though, this is absolutely idiotic; a case of idealized human interests trumping any and all other interests (human and animal). I remain hopeful for the day (or minute) when (these, and some other) humans pause, and actually think – identify a 'thing-in-itself', and further to reason from natural origin and value to ethics, principle means, and ends. In this case, both means and ends are severely misguided.
Brings to mind a popular slogan from the Vietnam era: "War is bad for children and other living things."