Subjectively, yes, I believe there are many people who "deserve" to die, but that does not mean be they ought to die.
The subjectiveness of "deserve" in and of itself tells us that no one should be put to death. If we are talking about capital punishment, I am of the opinion that the justice system is too fallible to dole out such a sentence. Even if a justice system were somehow 99% correct or in cases with apparent infallible evidence, the precedent cannot be allowed.