I can see both sides of the argument here. The cyclists have a right to be there, but that doesn't mean that there isn't a nutjob waiting to run them over. It obviously wasn't right for the driver to run anyone over, but it wasn't smart for the cyclist to antagonize the driver.
I'm all for cyclists rights, but I can't imagine being right and having the law on your side is all that comforting when you're being run over by a car.