@ekuber @jwz https://unevenearth.org/2018/08/the-social-ideology-of-the-motorcar/
This essay crystallized it in my head. People who buy cars believe they are buying the right to go faster than anyone else. When stuck behind in vehicle traffic they don't mind, those people bought the promise too after all, but a cyclist is sabotaging the promise the motorist paid tens of thousands for.
Though they would deny it if asked, all motorists see cyclists merely existing as an act of aggression and act accordingly.