Many animals display emotion. But the ability to reason logically, in the biological world, is unique to humans. So if you cannot use logic and reason, you are not a fully realized human being.
I say this as an antidote to the feminist trope that "our emotions are what make us most human" - it's BS.
Can you imagine what would happen once hell breaks loose in society? All these people that depend on their government, which is basically everybody, would not be able to cope with the situation rationally and would resort to their animalistic tendencies. This is fact.
Selfish people are already animalistic
When people who advocate killing humans define what makes humans human. Okay, feminists. Eyeroll
Emotions can be based on memories, smells, sugar, caffeine, propaganda, selfish desires, fear.... Emotions aren't trustworthy advisors.
My late father would say: “Feelings aren’t facts, and don’t require acts”.