It's a sensible response. A predictable one, even. That doesn't keep that sliver of hurt from lodging in his chest as Astarion expresses it, asks how it is Godfrey would kill him.

It has no right to startle him like this. This sort of concern is just what he was afraid of tripping over in the course of this talk. He knew how loudly his doctrine tended to speak for him - the overzealous parts of it, at the very least. He knew what Astarion would think when he opened this conversation. He knew there would be fear in him, that he might assume the worst. But there's something about hearing this particular charge, among the soft sounds of the night around them, which flashes reflexively in his face.

"Neither," His voice is light, soft, quick to reassure, "It's neither."