Charles Taylor explains many (most?) internet debates — and a great many others from the past two hundred years. If you ever wonder why people on Twitter (serious people, not mere trolls) can get so extreme in their policing of deviations from approved behavior, see “The Perils of Moralism,” in Dilemmas and Connections: Selected Essays (emphases mine):

Modern liberal society tends toward a kind of “code fetishism,” or nomolatry. It tends to forget the background which makes sense of any code — the variety of goods which rules and norms are meant to realize — as well as the vertical dimension which arises above all these.

We can see this above in relation to contemporary Anglo-Saxon moral philosophy, as well as in the drive to codification in liberal society. But the sources go back deeper in our culture. I want to argue that it was a turn in Latin Christendom which sent us down this road. This was the drive to reform in its various stages and variants — not just the Protestant Reformation, but a series of moves on both sides of the confessional divide. The attempt was always to make people over as more perfect practicing Christians, through articulating codes and inculcating disciplines. Until the Christian life became more and more identified with these codes and disciplines.

In other words, this code-centrism came about as the by-product of an attempt to make over the lives of Christians, and their social order, so as to make them conform thoroughly to the demands of the Gospel. I am talking not of a particular, revolutionary moment, but of a long, ascending series of attempts to establish a Christian order, of which the Reformation is a key phase…. (351)

Code fetishism means that the entire spiritual dimension of human life is captured in a moral code. Kant proposes perhaps the most moving form of this (but perhaps the capture wasn’t complete in his case). His followers today, be they Rawls or Habermas or others again, carry on this reduction (although Habermas seems to have had recent second thoughts).

Modern culture is marked by a series of revolts against this moralism, in both its Christian and non-Christian forms. Think of the great late nineteenth-century reaction in England against evangelical “puritanism” that we associate with names as diverse as Arnold, Wilde, and later Bloomsbury; or think of Ibsen; or of Nietzsche and all those who follow him, including those rebelling against the various disciplines that have helped constitute this modern moralization, such as our contemporary, Michel Foucault.

But these reactions start earlier. The code-centered notion of order and its attendant disciplines begin to generate negative reactions from the eighteenth century on. These form, for instance, the central themes of the Romantic period. Many people found it hard to believe, even preposterous, that the achievement of this code-bound life should exhaust the significance of human existence. It’s almost as though each form of protest were adding its own verse to the famous Peggy Lee song: “Is that all there is?” (353)