I don't know the statistics for the US, but here in Germany 75% of the accidents between cyclists are cars are caused by the car.

I drive a car now and then in Cambridge and Boston, and I have to be constantly on a lookout for misbehaving cyclists. It's like most of cyclists are not even familiar with basic traffic regulations. If I was not paying extra attention, and was simply following traffic regulations on my end, I would be involved in more that a few car/bicycle accident.

I'm sure you'd say the same about cars if you were a cyclist. Both bicycles and cars are driven by humans and they generally don't give a damn about the rules unless they benefit personally. The difference is that cyclists usually endanger themselves, while motorists endanger others.

I know that an anecdote is not data, but the only time I've been in an accident with a car, it was because the car ran a stop sign, causing me to slam into the side of it.

And yes, I was seriously hurt.