Yes there are a lot of bad drivers out there, but also there are bad cyclists. My experience has generally been good from cyclists, but Iv also had bad ones. But my point is, I wonder how this all would seem if the tables were turned. Drivers recorded and cherry picked what cyclists got up to. I believe there would be relatively as many so called numpty/law breaking/dangerous and what ever the other names cyclists have called them, cyclists out there.
I'm willing to bet you're wrong. No real way of measuring the dangerousness of cyclists, unless of course you compare the 2500 coffins a year filled by drivers and the half a coffin a year filled by cyclists.