donotdestroy:

What Happens In The Brain When We Dislike Somebody – Headspace

“In order to understand what happens in your body when you dislike someone, you can start by trying to understand fear. As Robert Sapolsky writes in “Why Your Brain Hates Other People,” when we see someone who even looks different from us, “there is preferential activation of the amygdala,” which means the brain region associated with fear and aggression flares up. This visceral, emotional reaction can spark a long-term pattern of dislike when it’s validated by action: if you perceive that someone has hurt you, your fear of them becomes rational. Our negative feelings toward someone get stronger as bad experiences with them pile up, and these negative thoughts trigger the fight-or-flight response in our bodies.”