Ah, but legal positivism is the norm in liberal societies, and not by accident. This follows directly from the demands of liberalism which privatizes discussion of the objective real and relegates it to individual sentiment. One of the paradoxes of liberalism is that the maximization of individual liberty necessarily demotes authority and elevates power, leading to tyranny.

So any appeals to the contrary are rooted in appeals to beliefs held in parallel with the liberal doctrines of the state. When Protestants ruled the US, that means some residual (often warped) Christian sensibility, because they were able to attain that consensus. But with greater competition today, that old consensus is no longer possible. Liberalism ensures that.