I’m not entirely convinced this is coherent. You seem to have the process ass backwards. It’s not that I have chosen to define what good is. Good... IS GOD. I cannot judge good from bad on an objective level any more than you can. Of course it’s not subjective, because I didn’t write the law that says “you shall not bear false witness”. God did. If I had written this law, it would be a subjective one.
If it was as you say, my religion would have 100s of commandments, because it would be shaped around what I want, but it isn’t. It was shaped long before me by God. I have nothing to do with it.
“So too can a Muslim make arguments about the violent commandments in the Quran”
You seem to think this is some sort of good point, when really it isn’t. If Islam is the true religion, and the true vision of God’s nature, then yes, Muslims would be absolutely justified to follow those words in the Quran...
But I don’t believe Islam to be true, and I don’t think the arguments for its truth are very convincing, just like atheism’s arguments. For instance, I don’t think “Allah” has the same great making properties as the Christian God. He is not all-loving. This is a deficiency no god should have.
I’m not sure why we’re continuing. You hold a deep-seated belief that there is no God, and I hold the opposite to be true. It’s hardly likely we’re going to agree on anything in this field.
“I don’t think...”
“I don’t believe...” and so on, all based on SUBJECTIVE reasoning.
An all-loving god cannot order a man to slaughter infants conceived to be born, but extinguished before they can exercise free will (this is a deficiency no true god can afford to have). Or indulge in other barbarism. If you think it’s good for your god to order so, then even your definition of “love” becomes subjective, trapping you into that same circular logic used to define what “good” is.
Besides, all your information about your god was derived from human sources, beyond the hundredth hand. As such, you must have greater faith in the ability of mere men transmitting you that information without corruption than the faith you have in your deity. Why would a true god arrange for the circumstances to be such that you are dependent on your faith in human integrity to build upon it your faith in the very deity? Your faith is a subjective choice, more to do with the randomness of the things that defined your geography and history than with any objective reasoning on your part.