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In his book on Jewish ethics, Rabbi Joseph Telushkin has a section on Judaism and vegetarianism. It starts with a story that Franz Kafka allegedly visited an aquarium and told a fish that he could look at it peacefully because he did not eat them anymore. There have been Rabbis that argued that one of the reasons for the kashrut laws was too make meat eating annoying so that humans would give it up. Judaism teaches that God only permitted humans to eat meat after the Flood because animals no longer trusted us. Other Rabbis argue that the Torah permits the eating of some meat at least and if God didn't want us to eat meat he would have said so.
Humans have been arguing about the virtues and non-virtues of eating meat for centuries. Saul is right. Humans are biologically omnivores and were meant for some meat consumption. Some societies have more or less abandoned meat eating in its entirety and others, mainly European, treated meat as a big prestige item in human consumption. Vegetables and fruits were distrusted in favor of grains and meats until well into the 19th century. I don't think this debate will end anytime soon.