When I was adding something about NPD with psychopathy to the neurodiversity page. He calmed down when I added the bit at the end.

Why did he get angry? Or, anxious, rather? Because he can’t change himself. He wishes he could. He wants to be accepted the way he is. That is the overriding drive in his life. It overrides any concerns he may have for the well-being of others as well as for himself.

How can you counter that?

Like this, sometimes. Anything that soothes children (hence also distracts) will likely do.

(Spatzen = sparrows. Dom = Cathedral.)