The human mind, this aids in carnivorous diets as we can use it to track and kill animals.
i mean, apes too have better minds by far compared to other animals. at least, from what we can tell. still they're herbivores. its not a trait/organ specifically for eating meat.
i think phanto is trying to argue that evolutionarily we came from vegetarian organisms, which is why vegetarian diets suit us better. the development of carnivorous qualities probably just came in handy with combat and when eating meats.
though tbh i know practically nothing about this, im just guesstimating from what little i know about evolution and how it has worked in general.