What's this? People expressing a lack of sympathy for the noble K'kree?
Gentlesophonts, the K'kree are the *tragic heroes* of Traveller (and, yes, the culture most easily placed as the near-objective 'Bad Guys' of the setting. Which, as a tangent, is fun to consider. The major factions are ultra-conservative control-freaks with a history of imperialism; reckless snobs-to-racists eager to show loyalty to The Party; conformists governed by the literal thought police; warrior cat people constantly trying to grab land; chaotic dog people known as pirates; manipulative amoral starfish things; suspiciously beneath-the-radar psychic lizards who are everywhere; and horses. And of these, the horses are the ones to watch out for.)
Given that they're xenophobic bigots who think it's their manifest destiny to take over the universe, impose their ways on everyone and exterminate all who refuse, it's kind of understandable that they get a bad rep.
But back to the sympathy bit. The K'kree evolved intelligence as a response to predation, and a means of escaping it. Their aversion to meat-eating isn't a philosophy, or an ideology, or a political stance. It's an ingrained revulsion, the very foundation of their ethics. Eating meat or allowing predation to occur is wrong, wrong,
wrong.
Imagine you made contact with a bunch of other nations and discovered that practically every one of them had a culture of eager, enthusiastic, brutal child abuse. Most of them think brutal child abuse is just fine and practice it regularly. On every street corner someone is cheerily abusing a child. Some cultures insist they can't live without it. Even the ones who don't indulge are perfectly happy letting other nations do it -- "sure, I don't brutally abuse children myself, but if my neighbours all want to get their kicks that way, live and let live, you know?" You'd probably conclude in horror that all other nations and cultures are horrible --
evil. Fundamentally illegitimate. Maybe you'd insist that such evil cultures must be destroyed -- especially if you think they're all eying
your children and thinking 'oh look, fresh stock!". Or maybe you'd be a moderate and say "we can change them by example, we can civilize at least some of them". And so you'd be diplomatic -- within reason, after all, since you're still revolted by their actions and beliefs. And you're not going to let them anywhere near your own children, are you?
The K'kree are hilariously unsuited to being a spacefaring power. Psychologically, culturally, physiologically, they're just not cut out for it at all. And indeed they'd be happy living the simple life grazing the fields together as one big happy family -- BUT... The universe is full of evil. Perverted, unethical beings are everywhere -- whole empires of them! And the K'kree must cleanse the universe of that evil. They must maintain an empire, and one day expand it again, and offer redemption and the opportunity to live ethically, all that they can, when they can.
Shed a respectful tear, gentlesophonts, for the race that chooses to face evil and endure hardship so that it may make the universe safe and just.
(This *was* about the Zhodani, I know, but I gave my answer to that earlier

)