Here's what I'm getting at: Let's assume we've all adopted a secular perspective in which either there is no moral authority that transcends human society or, if there is, that that authority should be permitted no role in our secular affairs. Given this assumption what does it mean to say that racism, misogyny and discrimination against LGBTQ folks are wrong? If there's no moral authority how can "wrong" mean anything more than "something some people don't like"? And if that's all we mean then what reason is there for all the outrage? Why not just accept that different people hold different values and let it go at that?
After all, something can be wrong in any meaningful moral sense only if there's an objective moral authority who promulgates an objective moral law and holds people accountable for living according to that law. If no such authority exists, or if any such authority is excluded from our public lives, then racism is little more than a behavior some people practice and some people don't like.
An example of the former is the famous 19th century British evolutionary biologist Thomas Huxley (1825-1895). Huxley was the man who coined the term "agnostic" to describe his own attitude toward God and was also a firm believer in the Darwinian doctrine of survival of the fittest.
His evolutionary convictions led him to believe that some races were superior to others, and he argued that emancipation of the slaves in the U.S. had doomed blacks who would now have to fend for themselves, a task for which he believed them poorly suited.
Huxley stated that, "no rational man, cognizant of the facts, believes that the average negro is the equal, still less the superior, of the average white man.”
Huxley's racism was little different than that of his hero Charles Darwin. Writing to the Rev. Charles Kingsley in 1862, Darwin stated,
It is very true what you say about the higher races of men, when high enough, replacing & clearing off the lower races. In 500 years how the Anglo-Saxon race will have spread & exterminated whole nations; & in consequence how much the human race, viewed as a unit, will have risen in rank.Almost twenty years later he offered similar sentiments in a letter to Irish philosopher and political economist William Graham:
Remember what risks the nations of Europe ran, not so many centuries ago of being overwhelmed by the Turks, and how ridiculous such an idea now is. The more civilised so-called Caucasian races have beaten the Turkish hollow in the struggle for existence. Looking to the world at no very distant date, what an endless number of the lower races will have been eliminated by the higher civilised races throughout the world.People today would be aghast were they to hear preeminent thinkers voice such bigotry, but the question we should ask is why do we consider views like those of Huxley and Darwin to be morally offensive?
One might answer that they're offensive because they're hurtful, but that answer assumes that it is objectively wrong to hurt others. But why is it? Is it wrong to hurt others because we wouldn't want someone to hurt us? It's of course true that we wouldn't want others to hurt us, but how does that make it wrong for us to hurt others? If we had the power to hurt others with impunity, in what sense would it be wrong to do so?
The secularist has no convincing answers to these questions. He or she has to assume that there is no relevant objective moral authority, that objective morality therefore doesn't exist and that all of our moral judgments are simply expressions of our own personal, subjective preferences, like one's preference for Ford trucks rather than Chevys.
If the secularist wishes to maintain that moral judgments are objectively meaningful then he's piggy-backing on a theistic worldview while all the while insisting that that worldview is either utterly false or irrelevant to morality.
In other words, the moral secularist must behave irrationally in order to assert that racism is wrong. On his own secular assumptions he has no grounds for claiming that anyone or anything is objectively wrong. All he can say is that he doesn't like it.
But how does a Judeo-Christian view of the world provide grounds for affirming that racism and other bigotries are morally wrong? It does so because according to that view all men are created by God in His image and are loved by Him. We are all equal in the sight of God, and God, the creator of the universe, demands that we treat each other with compassion and justice. Moreover, He will hold us ultimately accountable for whether we actually do or do not treat others this way.
To harm others is morally wrong because it violates the objective will, nature and law of God who is the ultimate source of moral knowledge and the ultimate standard of right and wrong.
Only if this is true can racism, sexism and bigotry of any kind be objectively wrong. Only if this is true does our belief that human beings have rights and dignity make sense. If it's not true then Huxley and Darwin were probably right, and we should cease our pretensions of believing in moral right and wrong and the equality and dignity of men and just do whatever serves our own interests and desires.
Of course the decision to follow that road leads to Adolf Hitler, the Nazis and the Holocaust.