The bolded are reasonable when one is hurt and venting. However, in past threads that you might not be aware of, it has happened that the person with a grievance isn't satisfied with "yeah, there are some real monster INFJs out there" or "I've felt really bad when I've hurt someone, maybe your INFJ feels bad, too", but instead wants all of us defined by those four letters to say that we are just as monstrous as the person who hurt them was. When things turn typist, and I think this applies to ANY type being berated, then it needs to be pointed out that those four letters aren't the be all and end all of who someone is.
When I've drifted towards typism, people have said something to me about it, especially other INFJs. And it made sense to me to curb myself when venting, to make my comments about the person who hurt me and not about everyone who happens to relate to the same four letters. And actually, this goes for ANY stereotypical grouping. A guy hurt me: all guys are scum. A person of a certain ethnic group hurt me: all people of that ethnic group are buttheads. Do they share common traits? Well, all men have penises, and high testosterone, so I guess all men ARE scum. And when you vent that to your male acquaintance and he says "I understand, some men are scum", do you keep after him until he admits he's scum, too? Would he maybe be hurt by the accusations, even though he does understand you're only venting?
Perhaps, when someone is venting in this manner, it would be best for the group being vented about to stay out of it. However, that sometimes is interpreted as the group taking sides and defending the bad behavior. It's a delicate situation. Especially if others with grievances start escalating the level of emotions. Then you can end up with an angry mob looking for blood. (I exaggerate to make a point.)
Anyway, for what it's worth, I like you. Your style of give and take doesn't seem to be incompatible with mine.