I don't think there are many people, even among Ts, who tolerate overt anger targeted to them very well, especially if it is frequent. It is just not normal for humans to sit calmly like a saint while someone is bombarding them with rudeness and I do not believe a therapist should either. But they should be open to hearing the client's criticisms, doubts, and generally negative feelings. What is talk therapy for if negative feelings cannot be brought up? I believe it should also be a good place to try out expressing negative feelings in different ways that is often not possible in everyday life.