I have come across a lot’s of people like these. like 99% of them. Sometimes it makes me think twice if what i am saying is wrong? What’s wrong with them. Is it so hard to swallow your pride and acknowledge that the other person is speaking facts? When they come to know they are wrong they proceed to insult/make fun of others to save their ass. Just why?
Ego has been mentioned. Sunk cost fallacy plays a part. Combine those and people tend to over value the effort they’ve made to form their opinion, either through some form of information consumption or synthesis of known ideas/held opinions, while devaluing/doubting the existence other people’s previous efforts. So, you often end up with two people who both think they’re informed and assume the other person is just making up an opinion right now and failing to see their valuable insight.
Add to this the social stakes, which are often unconscious. “I” might not think I care, but my neurobiology might