The issue comes after that, where we have to decide what we are going to do about it. I have seen on these threads many comments along the lines of 'men are responsible for most violence, therefore its reasonable to treat all men as potential attackers/rapists'
If you look at it from the perspective of a woman who is concerned about being raped it is a reasonable response. There is no way to identify a rapist from a non-rapist
It might be an understandable response in the individual, but that doesn't make it either a useful or desirable response in the group.
You have to look at what that response would achieve, in what way it would potentially benefit or protect the person experiencing it, in what way it would potentially disadvantage them, and what other impacts it would have if it were adopted by that group on a large scale.
So people treat all black people as potential criminal; results in potentially their group x% less likely to experience crime from black people, BUT they're all xxx% more anxious in day to day life, more prejudiced with knock-on effects on other dynamics in society, and ultimately they probably won't be any less likely to experience crime as individuals than if they didn't act that way. So is it the right response to the class analysis? On balance.... no.