death penalty "just or unjust"

It is not unreasonable that death penalty is one of the punishments system of criminal law. Because there are many unforgivable crimes such as murder , drug dealing to which the punishments such as fine , prison for a period of time ,even life sentence cannot be considered deserved. However , the question: “death penalty is just or unjust ?” is still a controversial issue these days. Some people cannot accept death penalty because they think that it is cruel. Others consider death penalty as a just punishment. In my opinion, I strongly agree that death penalty is a just punishment and it can be a deterrent to crime.
Firstly , according to people who disapprove with death penalty, they believe that the relaxation of harsh laws has never led to increase in crime. Therefore, the “deterrent” argument is unreasonable and death penalty never protects anyone. I can understand their belief in criminals ` amendment. However ,have you ever thought that criminals are really grateful for humanity of law or they take advantage of the relaxation of laws to continue to commit crime. It is clear that relaxation of harsh laws does not work but death penalty is different. Death penalty can make criminals feel afraid in order not to commit crime or at least ,it gives the cold-blooded drugs dealer something to ponder about his behavior. Above all, it protects the most vulnerable members of society , young children , from brutal sex-maniacs.
Secondly, the anti-death penalty consider that hanging, electrocution, gas chamber, firing squad are cruel punishments ,unworthy of human beings. I think that humanity is also necessary. However , do you know what difference between human and animals is. That animals can eat their fellow-creature without thinking but human cannot is different. It is the cruelty that makes difference. People say that death penalty is cruel but why they do not think about what the criminals did such as a robber uses his cosh to batter a harmless old lady to death in order to rob her of her meager life-savings or the drug dealers who just take care of their money but others ` life or brutal sex-maniacs who just know theirs satisfaction. Is that cruel? All of these criminals do not care about consequences which they bring out to others . Why can we accept their existence ?
Lastly, people who cannot accept death penalty find it civilized for criminals to have life sentence. Life sentence sounds pretty horrible .However, it is more horrifying to think that the criminals can literally get away with murder. We all know that “life sentence” does not mean what it says . After 10 years or so of “good conduct” the criminals are free to return to society where they will live comfortably with the money of his crime before or they will go on committing crime until they are caught again . It is clear that life sentence does not solve problem . People find it civilized but do they know how a civilized society is .That society has justice .Have you ever thought of the justice for the victims and their family? Were the victims who did not even know the reason why they had to die consulted before life sentence decision for the criminals? The answer is no because they were dead.
Try thinking about a society without death penalty ,can you imagine how much crimes the criminals commit. Death penalty is the most effective punishment to deter crimes and only death penalty can bring the justice to victims and their family.