Human morality is not relative in the least, observable as it is in every human child. We hate freeloaders. We loath undeserved success. We despise cowardice and we reward bravery. We prefer the underdog and we admire the stoic sufferer. This is observable in all human groups.
Yes, Nietzsche was right when he said we would find new Gods, and that they would not necessarily be better Gods. And it is beyond obvious that money and political ideology are two pertinent examples of highly salient things that have risen sharply as ‘god substitutes’ over the last century. Science might be another strong contender. But Nietzsche was wrong to say we could become Gods ourselves, and to put forward the idea that a moral force could have no place in our lives, or that Christianity in particular was somehow degenerate. I put it to you that he was exhibiting arrested development (in psycho-social terms). He was the son of a pastor after all! Unsurprisingly then, his atheistic incantations have an innately spiritual tone. He didn’t seem to be aware of the fact that he was, is nothing else, a brilliant mind working firmly within the tradition of protestant thought.
He was right when he said we needed to suffer to find meaning, but he was wrong when he prescribed placing ourselves as the ultimate source of authority. We need something above us. We need something to hem us in. Our own religious tradition is no less worthy than any other. This is a fact from which the everyday sins of individual perverts hiding behind the cloth should not divert us. Now is not the time to get peevish.
The French sociologist Émile Durkheim was nearer the mark when he said that the deification and pursuit of goals which are purely individualistic would drive us to insanity (actually, to suicide). For humans to be happy, or at least sane, Durkheim argued, they must in some sense be limited. If we remove the overarching meaning maker, or rule maker, to whom even kings were formerly subjected, then we would enter a valueless state which he called social anomie.
“Irrespective of any external regulatory force, our capacity for feeling is in itself an insatiable and bottomless abyss.”
In other words, the more we look into ourselves, the more we disappear up our own arsehole.