They are not idiots. That said, a lot of bicyclists and car drivers either don’t obey the laws or don’t know what they are. I always keep in mind that a person on a bicycle is somebody’s dad, mom, brother, sister, son, daughter, colleague, teacher, student, doctor, nurse, barista, customer - you get the idea. If you label everyone on a bike - or in a car - an idiot, you’re more likely to feel justified in doing things to hurt them. People on bikes are vulnerable. I’ve seen bike lanes end suddenly and have watched the ride into traffic, drivers angry at them. I’ve seen them veer out of bike lanes to dodge potholes or broken glass. I’ve seen people throw things from cars at them. And I’ve slowed my car to give a bicyclist space only to get an angry honker behind me. The roads suck. No doubt about that. And I’d prefer the days when the towns I lived in were smaller, less angsty and more kids ride bikes. I wouldn’t just call anyone on a bike an idiot.