When a group of conservative Downers Grove parents organized this year to oppose mask mandates and equity initiatives at schools, it led to some tense school board meetings in the western suburb. Yet students at Downers North and Downers South high schools said they didn’t see a big impact on their lives until the parents sought to remove a graphic novel by a nonbinary author from the school libraries over concerns it included a few sexually explicit illustrations — a fight that caught the attention of the Proud Boys, a far-right gang that has recently seized on the culture wars...