1. Your god is supreme, and can do whatever it wants (even order genocides and child slaughter).
First, let’s acknowledge that number one above is as solid a reason as any could ever be. No refutation of it makes sense.
Who? Allah?
What source informs us that we can use human standards to judge God’s will?
What else does being created in a deity's image entail, other than that the created perceive similar codes of morality as the entity it was modelled after? To avoid this conclusion by surrendering to the statement that your god can do whatever it pleases, including such abhorrent things violating the Golden Rule as ordering child-slaughter, is to accept a serious moral contradiction in your own accepted dogma. The fact that this problem is so inadequately addressed in the circles of theology reveals the inclination to ignore and shrug under the proverbial carpet, this serious, serious moral flaw.
I think you understand very well that man’s level of understanding of morality and all other topics necessarily exists on a significantly lesser scale than God’s level of understanding. Whether you think of God as real or as imaginary, the difference in level of awareness is part of the equation.
This fact is logically necessary as well as scripturally based: “My thoughts are not your thoughts, nor are your ways my ways.” (Isaiah 55:8).