My conclusion is that each/any/every/all materialistic/atheistic/naturalistic moral/ethical concepts are immoral/unethical. There, is that enough synonyms? Just want to make sure I cover my bases.
How and why?
Because no materialistic/atheistic/naturalistic moral/ethical concepts provide justice and are therefore, themselves, unjust and are therefore, themselves, immoral/unethical.
But how can this be considering that many judicial systems in the here and now do, indeed, mete out justice?