>"that people respond with a fight-or-flight response to ideas that challenge their core beliefs?" I believe a large part of this is due to people's personalit

>"that people respond with a fight-or-flight response to ideas that challenge their core beliefs?" I believe a large part of this is due to people's personalities. Namely, Openness and Agreeableness. (https://en.wikipedia.org/wiki/Big_Five_personality_traits https://en.wikipedia.org/wiki/Big_Five_personality_traits) It stands to reason that someone who is low on openness and not agreeable would react poorly to their core beliefs being challenged, and vice versa.