Pretending that there aren't extremely toxic cyclists doesn't help the problem.
Cyclists don't have to be toxic for the whole setup to not work, they just have to not obey the same laws that are in place for cars. Where I live, I'm more likely to be hit by a cyclist on a pedestrian crossing than by a car.
And no, cyclists don't often ride between lines of cars. Some cyclists do that. Just like some drivers are reckless jerks.
Every group has bad actors. I'd even wager both groups -- cyclists and drivers -- have the same percentage of morons.
You seem to be claiming that all cyclists have to be saints "for the setup to work", which is bizarre. The rules in most cities in the US clearly prioritize cars over people. As plenty of other cities around the world have demonstrated, changing those priorities changes behavior.
This isn't rare, either - there's at least 1 shouted interacted per week.
It's no wonder my friends are afraid to get on the roads/their bikes.
1) A car comes within centimeters of side swiping me and knocking me down. They don't even notice I'm there.
2) They stop at the next traffic light, I tap on the window to tell them to be more careful.
3) They get angry at me.
4) Other drivers see this interaction and soon you see articles in newspapers complaining about "militant cyclists"