Isn’t murder the “unlawful” killing??
Probably using the wrong word if that be the case. Or - make a “law” that forbids God from killing and then call Him a murderer next time someone dies??
Yes.
But, since everyone dies, then the death rate or killing is 100%, since God is behind nature itself, and has specifically made us mortal, no less.
Right? So, the OP question is only a small bit of that bigger picture.
But, we learn from the same text telling us all of these things that cause these questions like the OP question, the very same text, that death of this body is only like a doorway or
"sleep" (the actual word used repeatedly in scripture, such as by Christ, no less).
A transition. To next the accounting, where:
Romans 2:6 God "will repay each one according to his deeds."
Or more fully --
7To those who by persistence in doing good seek glory, honor and immortality, he will give eternal life.
8But for those who are self-seeking and who reject the truth and follow evil, there will be wrath and anger.
9There will be trouble and distress for every human being who does evil: first for the Jew, then for the Gentile;
10but glory, honor and peace for everyone who does good: first for the Jew, then for the Gentile.
11For God does not show favoritism.
12All who sin apart from the law will also perish apart from the law, and all who sin under the law will be judged by the law.
13For it is not those who hear the law who are righteous in God’s sight, but it is those who obey the law who will be declared righteous.
14(Indeed, when Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law.
15They show that the requirements of the law are written on their hearts, their consciences also bearing witness, and their thoughts sometimes accusing them and at other times even defending them.)
16This will take place on the day when God judges people’s secrets through Jesus Christ, as my gospel declares."
Romans 2 NIV
And this is one way to begin to see why we need a Redeemer, one who can restore us, make us new.