The Christians will tell you that their god is defined as being good, so anything that god does is good. That would include commanding murder and rape or wiping out the entire world's population in a flood. I'm atheist, so there isn't a god for me to call good. If there was a god, its goodness would be just as subjective as your goodness or my goodness. Just being a god doesn't make you objective.
Also, murder means to kill without a justification, so I don't think God would command murder(to kill someone for no reason) at any rate. That would seem to go against His nature, as rational and morally perfect being.
It is akin to saying that the judge, who sentences the criminal to a death sentence, does murder. No, that's a punishment, which comes with the justification that the criminal has made himself worthy of death.
Say we acknowledge for the sake of argument that a malicious Creator/Designer exists. Seeing as this being is evil, that signifies he does not carry out his moral responsibilities. But then exactly where do those come from? Just how can this evil god receive obligations to execute which he is violating? Who prohibits him to do the immoral things that he does? Without hesitation, we discover that such an evil being simply cannot be supreme: there needs to be a being that is even higher than this evil god which is the source of the moral duties which he prefers to shirk, a being that is unqualified goodness Himself. Hence, if god is evil well then there must necessarily exist a maximally splendid, incomparable God that is all powerful, all good as well as all loving; One who is actually the very paradigm of good. Which means that we don’t shower Him with affection for performing His duty. Really He is to be adored for His moral identity as He is fundamentally loving, just, kind, and so on. It is simply because God is that way that all these traits count as virtues to start with. In effect, God Almighty is good the very same way rain is wet, diamond gemstones are hard, photons tear across space at luminous speeds or cerulean suns blaze. Therefore if we envision God’s goodness in terms of His possessing definite virtues as opposed to fulfilling selected duties, we get an infinitely more exalted and correct notion of God.