It’s a core foundation of Fascism to define “us” and “them” groups, blame the “them” and if in power followup those words with actual actions against said “them”.
Sex being the thing which generates the most tension in peoples’ minds in present day society - we pretty much all want it and yet we’re taught that it’s somehow “impure” and interiorize all sorts of boundaries around it and judgements on people who don’t obbey said boundaries - it’s only natural that people who are a minority in practicing some sexual practices that the majority does not are chosen as “them”.
We might have the tech, but socially and psychologically most of humanity are barelly changed from cavemen days and we might have even gone backwards (there was a time when nakedness was far less “frowned upon”), so cross these two of the biggest disfunctions in the psyche of many - sex and tribalism - and you end up with this kind of shit.