This week, the Law Commission in the United Kingdom proposed introducing grades or categories of murder, not unlike the system in operation in the United States. Presently, murder convictions in the UK carry a mandatory life sentence, as they should. There is no 1st or 2nd degree murder. Now under new proposals from the commission, courts should consider a person’s intent and whether or not there was an intention to kill.
It is not "devaluing human life" to take circumstances into account. In fact, one might suggest that is "devaluing" to reduce people and events to homogeneous, interchangeable units.
And degree-based homicide is most definitely not a "victory for criminality." Quite the opposite. By allowing lower degrees of homicide, you increase the likelihood that a wrongful taker of life will in fact be punished. Thinking strictly in terms of the guilty, it is far better that they be convicted of manslaughter than acquitted of murder.
Perhaps watering down laws may make the prosecution's job a little easier, but it doesn't change the fact that a murder has been committed. Circumstances should be taken into account in cases of self-defense or accident, but whether or not someone planned to kill days ago or acted in the heat of the moment, will not reassure a weary public when a murderer is allowed to roam the streets. If anything, a person who kills in rage should be punished more severely as they clearly lack self-control and short fuse killers on the loose would present a serious threat to civil society. I suppose we will have to agree to disagree.