Voldemort is terrified of his own death, so much so that he's gone to the most extreme lengths to avoid it, even to the point of de-humanising himself and splitting his soul. And yet he throws other people's lives away so carelessly. it's safe to assume that he enjoys it. The fact that he can inflict something which he believes is the worst thing that can ever happen to someone, and in such an easy way, is one of the many reasons why Voldemort is such a terrifying villain.
