I liked the author's write up on liberal democracy, as an embodiment of this mystic spirit:
"Liberal democracy is “essentially evangelical,” founded on a religious insight into humanity’s unity and dignity. Preserving liberal democracy is thus not so much a matter of legalistically defining rights and norms, as of keeping alive this “religious character” of openness to fresh expressions of its founding intuition that all human beings are equal"
"Democracy is not only one form of political regime among others, but a mystical, messianic, open religion."
As per @cratermoon's comments though, I think this is where the article quickly goes a bit off the rails.
"It is also to say that democratic societies can only survive insofar as they remain to a great extent closed, becoming a new kind of theocratic anthill in which the antinomian or anxiety-producing potential of individual thought is largely neutralized by convention and myth."
Here I feel like we're stumbling poorly into the Paradox of Tolerance, confusing the ardency with which openness must be insisted upon with a closed-ness.
We see this today in those who attempt to weaponize the idea of censorship when society attempts to minimize the destructive effects of intolerant views.
Further reading
https://www.stuff.co.nz/national/christchurch-shooting/11139...
Today, I think you are making a mistake and reversing the order.
It is the intolerant that are weaponizing censorship to minimize the destructive effects of the tolerant.