I think there's a big difference between "everyone else is awful", "there's statistically enough awful individuals" and "every driver is trying to kill me". Only the last one of those is going to lead me to incorrectly blame a whole group.

I agree that a statistically significant subset of drivers cause problems (and a statistically significant subset of cyclists, too), but the vast majority of individual drivers (and cyclists) are safe and do not deserve to be grouped in with the the problem-causers.