iirc that's taking a 90s or early 00s study of highschool kids and bullying where the homophobic bullies were more likely to themselves be gay and extrapolating it to society. and i don't even know if the study was credible or even real or if somebody got clever and was like

ah-ha! if i tell the kids bullying others for being gay will make everyone think they are gay they'll stop bullying the gay kids