Amidst The Shifting Sands of Humanism (cum Deism)
Humanism (n): an outlook or system of thought attaching prime importance to human rather than divine or supernatural matters. Humanist beliefs stress the potential value and goodness of human beings, emphasize common human needs, and seek solely rational ways of solving human problems.

In World War I 950,248 civilians died as a result of direct military actions, but in World War II between 37,585,300 to 55,883,000 civilians died as a result of direct military action. Why? Because what was morally unacceptable and wrong in World War I was no longer so in World War II. Bombing civilian targets, a major no-no, was now just “collateral damage”.

God is the creator of everything, including things we, from our limited, stunted point of view, consider to be ‘good’. “Perhaps you dislike something and it is better for you, and perhaps you love something and it is bad for you. God knows and you do not know.”(Qur’ān) Intelligence has a limit beyond which its sight can not go, and no sane person would put complete reliance on something that is limited. We can’t say what the end outcome of a situation/event/matter will be, and if we do say anything it’s just a guess.

What is considered morally right among human beings changes from person to person, and culture to culture. It can easily be distorted by a person’s desires, point of view, self-interest, understanding, upbringing, etc. etc.

For example, a man may decided that it is morally objectionable for him to suffer his sister to be married to (or have to shack up with/date) a total stranger and have to go through a period of adjustment and figuring this other person out, when he has grown up with her, and knows all of her moods, etc. It would be much better and ever so much more practical for him to have a sexual relationship with her and avoid all that trouble. Just because a man can compose an argument out of ‘logic’ and cloak it in eloquent words does not make it right.

In answer to the first part of the question, whatever God commands is right, no matter how our finite minds and short-sighted vision might see it.

If you say that there is something called right, and there is God commanding from it, you are saying there are two gods. You have a god called Good, and a god called God. “If there were gods in them besides God, they would both be corrupted.” If you have more than one god and one of them orders something to move, while the other orders that same thing to be still, what will happen? If the one ordering the thing to move doesn’t get their way, they aren’t God, because they are not All-powerful, and if the other doesn’t get their way, they aren’t God, because they aren’t All-powerful.

There is the creation, and the creator of all creation who is unique in His essence and qualities, and there is no third category. And the Creator of all the creation, who gave them life, caused them to exist, continues to cause them to exist, and sustains them can do with them as He wills without anyone to question or reprimand Him about what he has done.”He will not be questioned about what he did, but they will be questioned about what they did.”(Qur’ān)

To conclude,  Allāh, Blessed and Exalted is He, says, “O, My slaves! Indeed, I have made oppression unlawful for Myself, and have made it unlawful amongst you, so do not oppress one another.”(Ḥadīth QudsīImām al-Nawawī explains His statement, “I have made oppression unlawful for Myself,” in the following words: “The culamā say it means He is free of it: oppression is impossible with respect to Allāh, Pure and Exalted is He. How can He, Pure is He from every defect and flaw, exceed boundaries and limits when there is none above Him whom He should obey? How can He use the possession of another when the entire universe is His property and dominion?”