There is a well documented 'minority group' cognitive bias where all participants of a minority group are tarred with the same brush of a subset of the associated group. It's actually a important survival trait which helps us avoid danger where we come across it, it helps us respond quickly to our environment without relying on our slower rational brain to make a decision when you might otherwise be put in harms way by hanging around thinking for too long.
Imagine you came across an aggressive animal, one you are not overly familiar, and the encounter ended with a bite, you'd know next time to be wary of that same species without thinking about it too deeply. However, it just so happens this one animal was particularly cranky because it had a thorn in it's paw. It would have otherwise left you alone. Next time, if you dwell on the experience rather than flee, you might realise clearly that was a one off event, or doesn't represent the larger grouping. You made the initial thoughts instinctively without applying rational thought, it's helpful for animals who can't think rationally, and is probably a evolutionary hangover from that, it might keep your safer but it's not necessarily a true reflection of reality. It throws up a few false positives, but the risk of a false positive is inherently less risky than a real threat. This bias applies to all manners of quick judgement calls.
It's a great survival mechanism, but it doesn't help us with understanding reality, we are flawed beings. I don't need to remind you, humans don't really see reality, just their own prespective of it. This is why motor drivers who make up the majority of road traffic don't get the same treatment and red light jumping cyslists.
Hence when one cyclist jumps a red light, we are all 'given a bad name'. Where you encounter such flawed arguments, you might be advised to simply side step the other party, as they are usually quite unwilling to participate in rational debate. It seems that in my experience, people mouthing off are rarely rational beings, yet seemingly the most rational of us are prone to this biases. See this case of
Lord Winston, supposedly a man of the scientific method, doesn't apply the same rigours to minority groups does he?
Despite what we think, we are really not as smart or rational as we perceive ourselves. We hardwired like ape. /BeatsChest