It's a Blues brothers quote, right? I still don't get it after all these years, but I know it's a popular quote from the movie.
(never saw the movie, but who doesn't know the Blues Bros?)
The only good Blues Bros movie.
When Jake and Elwood are stuck in traffic backed up by Nazi marchers, they ask a cop what is going on, and he tells them, "Those bums won their court case, so they're marching today." Elwood scoffs, "Illinois Nazis," and Jake agrees, "I hate Illinois Nazis." This is
a reference to a mid-1970s incident in which the National Socialist (abbreviated in German as "Nazi") Party of America planned a public demonstration in Skokie, Illinois (the population of Skokie was not only heavily Jewish but also contained an unusually large number of Holocaust survivors). After the local governments provided various impediments to the Nazis' march, they eventually took the matter to
the Supreme Court, which led to a 1977 decision (National Socialist Party of America v. Village of Skokie) in favor of the Nazis' First Amendment right to Freedom of Assembly. The group subsequently did hold several Nazi rallies, but in Chicago instead of Skokie.
I didn't know the details but did twig to
the reference and general meaning at the time.