That's a pretty unfair standard; no psychological statement is true of literally all humanity, and only someone very naive would try to generalize that broadly.

That's a pretty unfair standard; no psychological statement is true of literally all humanity, and only someone very naive would try to generalize that broadly. I don't know the author at all, but I'm willing to give them that much credit. Let me try to reframe his point in a way you might find more palatable. When you feel anger, it's an opportunity to learn something about yourself--an opportunity that most people ignore. You'll always feel like you have a good immediate reason to be angry because that's how emotion works, but those explanations are often retroactive and superficial; they don't point toward a change in the world that would make your anger go away. Projection one such failure mode, and a very common; so common, in fact, that many people would do well to check themselves for it every single time they feel anger. The author illustrates his point with a concrete example. Perhaps none of this is useful to you personally. That's fine. But you aren't representative.