It's about a race war in a super liberal 1990's america (written in the 60s) where he basically describes a crime ridden rape world where scared liberals afraid to be called racist have taken away everyones rights and then "the orginization" (a terrorist group of white supremists) begin a series of campaigns across the country, and
Ironically the main character, and heros of the story hate conservatives almost more than they hate liberals, even going to the exctent to excecute one of the orginizations high ranking officers for being too conservative.
In the end it gets to the point where the organization seems straight up antichrist, even putting a mark on liberals foreheads after they take over, and the fans, or author dont seem to notice the fact that they made themselves the antichrist from revelation.