Sloterdijk's Critique of Cynical Reason

Sloterdijk's Critique of Cynical Reason is a controversial book. It is of course very bold to parallel Kant's most famous work's title, Critique of Pure Reason. The two or three chapters argue philosophically against the dialectic of enlightenment, and then the book moves into a historical description of iconoclasts. It has a long cultural discussion of the Weimar Republic, then the Nazi regime. One could read into this a condemnation of political correctness, which no doubt is the reason for the book's controversy.