Porky's II: The Next Day

After dealing to Porky the "fatal" blow that was coming to him, the gang from Angel Beach is ready for a new challenge: The High School Drama Club is producing a Shakespeare Festival in which the gang is participating. Unfortunately, a religious leader named Bubba Flavel wants to halt the production because he and his group, "The Righteous Flock," maintain that Shakespeare is indecent and profane. As part of their effort to keep their school-based Shakespeare production on track, the gang from Angel Beach seeks out the help of Seward County Commissioner Gebhardt, who initially promises the gang from Angel Beach that he will pull some strings to keep the Angel Beach High Shakespeare Festival running. However, after the county commissioners, who all will shortly be standing for re-election, vote unanimously to shut down the Shakespeare Festival, the gang quickly learns that Commissioner Gebhardt has reneged on his promises to the Angel Beach gang because he feared that allowing the Shakespeare Festival to proceed would harm his re-election chances. The local Ku Klux Klan chapter joins the movement to shut down the Shakespeare festival because its members object to an American Indian (Runningfox's Seminole character) playing Romeo opposite a white girl Juliet (Wendy). Flavel, who has previously exposed his bigoted nature, welcomes the Klan's support of his movement. The Angel Beach gang then begins plotting their retaliation and revenge against Flavel, Commissioner Gebhardt, the rest of the county commissioners, and the Klan.
The teens discover that the county commissioners, who are publicly riding the political wave of decency and morality, enjoy secretly watching pornographic movies in the basement of the courthouse. So, the Angel Beach gang takes a tape recorder with a microphone to the basement of the courthouse while the county commissioners are watching pornographic movies, aim the microphone at the ventilator window, and record the politicos' loud and crude commentary on the events in the porno films, including their irreverent mocking of Flavel (And the fact that Flavel provided some of the pornography).
After his success in shutting down the Angel Beach High Shakespeare Festival, Flavel convenes an outdoor revival meeting at Angel Beach High to commemorate his success, and the county commissioners attend and stand on stage with Flavel. In retaliation for an attack and attempt by the Klan members to shave the head of the group's Seminole friend, the gang lures the Klan members (who are on their way to Flavel's revival meeting) into the school gym where the gang along with a gym-ful of Seminole Indians "persuade" the Klan members to submit to having their heads shaved. The Angel Beach gang and the Seminole Indians then make the Klan members strip naked and march over to Flavel's revival meeting where they force the hapless and humiliated Klan members into the revival meeting. The sight of naked men shocks the crowd, and in his typical opportunistic fashion, Flavel decries the naked Klan members as being "The Spawn of Satan." During Flavel's prognostications, the gang commandeers the public address system and plays the recording of the county commissioners' raucous commentary on the pornographic movie that they watched in the basement of the courthouse only days before. A comment on the recording about Flavel having donated the pornographic film that the county commissioners were watching ends up being Flavel's undoing as he and the county commissioners stand before the crowd completely discredited, disgraced, and exposed as selfish hypocrites.
Meanwhile, Wendy accepts an out-of-town dinner date in Miami with Commissioner Gebhardt, who intends to seduce her. However, rather than showing up in her normal modest clothing, Wendy shows up at the formal restaurant wearing a deliberately showy, vulgar outfit with her breasts artificially padded with a container to an enormous size. She speaks in an extremely loud voice, constantly blurting out Gebhardt's name and status as a county commissioner of Seward County who will shortly be standing for re-election and alleging that she and Gebhardt became involved while she was a Brownie in Gebhardt wife's girl scout troop and that she is now pregnant with his child. With the help of liquefied corn-and-pea soup concealed in the container that padded her bust, Wendy pretends to throw up in one of the restaurant's decorative fountains to the horror of the maÃ®tre d' (who had earlier alluded to previous "dates" Gebhardt had enjoyed at this establishment) and the disgust of the restaurant's upscale patrons. Pee-Wee snaps a picture of the disgraced Commissioner Gebhardt (with an encouraging, "Smile and say, 'I'm Ruined!'") before he, Wendy, and Steve depart in a blaze of glory back to the rally at Angel Beach High to join the triumphant celebration of the defeat of the persons responsible for the cancellation of their Shakespeare Festival, which is promptly reinstated.

Question: Who joins the movement to shut down the Shakespeare Festival?
Answer: The Ku Klux Klan