Yes. Beyond classification of human morality, we are in the category of Divine morals.
Some sins are intrinsically evil and this is one. We are servants of God, not deciders of destiny. God has a plan for each of us and murder short circuits God's plans as well has removes the potential for other duties that servant would otherwise render.
It's not important what I believe. Scriptures tells us murder is sin. It goes as far as to tell us even hating someone is murder. And you forgot some important attributes of God.
Not only is he all Loving, he is all Just all Righteous and all Holy. He's not a prisoner of just one of his attributes. God always always acts in a way that is consistent with his full attributes. He will be glorified in his Holy Hatred as well as Loving Mercy. Everything he does is Just. Better yet, "Just" is the definition of what he does. And God hates all who does iniquity. O sure he is patiently surpressing his final Holy Wrath. But that day will come when all evil is wiped out.
I quote pastor MacArthur
Let me say it another way. Because God loves does not mean that His love is separated from His other attributes. It does not mean that that love exists, as it were, in isolation from everything else as if it was untouched, unmodified and unmixed and unaffected by holiness, wrath, righteousness, judgment and every other attribute. God is neither the jailor nor is He the prisoner of any of His attributes. Each of them acts not independently but in perfect harmony with all the others. If God then is to glorify Himself, He must put all of His attributes on display. And whatever His love accomplishes can in no way obliterate His other attributes. Whatever His mercy and grace and kindness and goodness and tender-heartedness achieved cannot obliterate what will be made manifest by His hatred, His anger, His wrath, His vengeance and His justice. All of God's attributes have a place in the demonstration that He carries out through the purposes of creation
If you understand this one great surpassing truth about God, it's going to answer all those difficult questions that I posed at the beginning. If you only understand this, you're on the way and that is the simple truth although it is profoundly revealed and much of it unknown to us...the simple truth is God does whatever manifests the fullness of His glory. Whatever puts His glory on display and His glory is the sum of all of His attributes. God cannot in doing one thing cancel out something else. God's glory is the issue