This is the thing I don't get Person A gets a a lot of abuse from people who self identify as a members of Group B, Person A grows tired of the abuse and lashes out at Group B, this then seems to lead to some portion of Group B deciding that Person A is at fault for lashing out at Group B and further abusing them. Instead what should be happening is that those who don't support the abusive members of Group B should be reaching out to Person A and saying 'hey those assholes don't really represent Group B, while I may disagree with you I respect and support your right to your opinions'.
Here's the thing, a lot of people from group B did just that (go and read the thread about the whole situation with Anita fleeing her home). Thing is that group A decided that if
anyone associates with Group B, then they are all the sum of their worst parts.
Both group A and group B (in large, there are people who self associate with A and B but aren't apart of the greater group mentality) know that the behavior of some of the people in group B is deplorable. The majority opinion of group A (as per twitter, gaming journalism, etc) is that all of group B should be ridiculed/disbanded and that everyone who is good in group B should leave group B and form a new group C or D. That if anyone stays in group B, they are automatically the racists/misogynists/etc.
No one is saying there isn't a problem. No one is saying that those assholes bringing down group B shouldn't be dealt with. The problem is that a lot of people in group B feel that group B is still overall a positive thing, and that to try and destroy group B because of a minority membership is damaging to their identity as individuals and as a whole.
So now, effort that should be spent on removing those assholes is being blown in a war of "group B is bad, get rid of them" and "Not all of group B is bad, stop lumping us all with the few assholes."
No one wins in this scenario as both group A and group B should be focusing their attention on the
fucking assholes but instead it's easier for both sides to fight a war of attrition on semantics and generalizations (which both sides say are bad, but that both sides continue to use all will-nilly like).