Cyclists who run red lights are annoying, dangerous, and give good cyclists a bad name.
The acceptance of this attitude is a BIG problem. It's narrow-minded prejudicial stereotyping and it's dangerous.
Doctor Harold Shipman was quite annoying, what with his killing 218 people and that, but did he give good doctors a bad name?
Nurse Beverley Allitt was also somewhat annoying and dangerous, with all that killing children stuff, but did she give good nurses a bad name?
Customer Service Representative, Anders Breivik was even more annoying and dangerous, with all that slaughtering of 77 innocent children business, but does he give good customer service representatives a bad name?
Probably not, but then, we are all dcotors, nurses, customer services representatives and the like, or our friends and family are, so we identify with them. The are acceptable, normal, understandable; we can empathise. But cyclists? Noooo, they're weird. Dressed in spandex, in broad daylight? Getting places more quickly than the queueing cars? Not normal. No empathy.
Idiots on bikes who run reds on busy pedestrian crossings are idiots, who happen to be on bikes. They aren't representative of cyclists, any more that Harry, Bev and Anders are representative of their societal categories.