I have in the past stood there, watch paramedics treat a cyclist with his chin bone sticking put his knee, and then listened to him shout at me "it was my right of way" as the meatwagon doors closed as if that will somehow help him walk again.
Mickle is right, people shouldn't judge whole swathes of society by the actions off few. Unfortunately, life isn't perfect and cyclists in particular at under more scrutiny in the media etc than car drivers. One bellend cyclist does our cause far, far more harm than one nobwad car driver does.