Life is the most wonderful gift that God gives us. He also gives us the power to do what we wish with that life. We can keep it and guard it, or we can take it away. It follows that murder is the worst crime anyone could ever commit. It is a crime that no one can ever make right because once you take a life away you can never give it back. Is the death penalty appropriate in our society today? I believe so, it's simply that punishment given to criminals are made to fit the crimes they've committed. The worst crime possible should therefore receive the worst penalty possible. That penalty is the death penalty. Take, for example, the case of a man who is caught shoplifting. He does not deserve the same punishment as someone who is convicted of assault and battery. Most people would have no problem agreeing with this. Yet many of these same people believe that a cold-blooded killer deserves the same life sentence as a convicted kidnapper who did not kill his prisoner. Granted these are both serious offences, but our system of law works by degrees of seriousness. The mental damage done to that prisoner can be turned around, but the life taken away by the murderer can never be given back. They should therefore be given a harsher punishment than life in prison. In terms of justice, we should all get what we deserve. .
One argument, which favours the death penalty, is that the Bible says, Ran eye for an eye, and a tooth for a tooth. This could very well mean a life for a life as well. Although at one point, the bible tells us not to murder, the death penalty is not quite the same as murder. It is an exacting of justice. There is severe punishment due to severe actions, the death penalty is to society as hell is to Christians.
People who are convicted of murder more often than not have more crimes than just that one murder under their belt. Their mental state allows them to commit horrible acts and not feel guilty about them.