Guy goes to all that trouble (and there will be trouble for a long time, even if the victim doesn't push it) and the other guy denies him the satisfaction of getting upset. Cold. Very cold.
The Marquis de Sade at one point was involved in the Revolution. He was given a list of names of people he could have shortened. The name of his mother-in-law, who was the major force behind his persecution, was on the list.