Maistre argued that the "rationalist" rejection of Christianity was directly responsible for the disorder and bloodshed which followed the French Revolution of 1789.
"Thomas Garett Isham wrote the book Contra Mundum about Joseph de Maistre and his ties to esoteric teaching. In particular, he compares Maistre to Guenon in a fruitful way. He has previously written a few books on the Enneagram. [...] The most influential essays on Maistre have been by the atheist Isaiah Berlin and by the nihilist Emil Cioran. As Mr. Isham points out, they both see in Maistre only a proto-fascist; yet Berlin condemns him and Cioran praises him. Obviously, such an anachronism does a disservice to Maistre. Berlin and Cioran are unaware of the Maistre’s deeper spiritual project.
First of all, he was intransigently opposed to the philosophes of the Enlightenment. Although a conventionally religious Catholic, he recognized the importance of the esoteric dimension, which was not opposed to exoteric practice. Thus for years, he was a member of a Masonic lodge. But that was at a time when it was more focused on esoteric ideas, before the Masons became a secretive political power. In particular, Maistre was influenced by the illuminist writings of Louis Claude de Saint-Martin."*
[*] Source: «Angels, Templars, and Joseph de Maistre» by "Cologero", 2019.