The lie that many people who eat meat tell themselves

The Lie That Many People Who Eat Meat Tell Themselves - Science of Us
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If you ask a meat eater, “Which meat is okay to eat, and why?” most people will at least attempt to form a coherent answer couched in moral language. They’ll attempt to defend their own decisions, in other words, on some rational basis.
But as we know from piles and piles of research into moral psychology, people hold many moral beliefs not for rational, easy-to-explain reasons, but rather for gut-level, intuitive, hard-to-explain ones. When it comes to our morality, we are frequently post-facto rationalizers. We act as though we carefully deliberated and came to this or that conclusion, but really the process works in reverse. We develop a moral belief for whatever reason, and then build a rationalization around it, like some pretty but flimsy facade. (There are obviously exceptions to this; people plainly evolve in their moral thinking, and there’s no shortage of controversy on what “rational” even means in many moral contexts.)