In the same way all drivers get disrespected because a few of them go round driving dangerously and killing people? Oh wait…
Things is, when people find out I ride a bike for fun, its not unusual to get moans about how they were held up behind a group of cyclists, buzzed too close by a mountainbiker, sworn at by a roadie etc. etc. (and we don’t pay road tax, we jump red lights)
When people find out I drive a car I don’t get moaned at about someone one else reckless driving.
Cycling is a sport and a minority activity, so yes, we often do get tarred with the same brush. A bunch of riders behaving badly in a particular area WILL affect how other riders are seen in that area.