Riff didn't have feelings to hurt, let alone over people he'd murdered himself. But 'Riff Greer, dutiful son and victim of tragedy' did, so when Lyon said that, Riff's body stiffened with 'righteous anger'. When he spoke, his voice was tight, "So I've heard. So you will understand why I don't feel the need to show being torn up over matters such as that."
He seemed to catch himself and collected himself. He was his polite and calm self mask again. "But you're right, there's no room for that here. To recap, in our terms my family, however small it is, is not exempt from your crusade and I have the right to defend myself should I find your crusade puts me in harm's way."