Obviously the show is grade A copaganda. Fincher has always really loved the idea of a bunch of unhinged psychos lurking behind every corner to get you. Really plays into the thesis of Programmed to Kill, which is that the feds/CIA created the idea of the serial killer to cause fear and chaos in the public so that we would welcome the police state we currently live in.
Pretty sure if the FBI was making up serial killers they wouldn't all be white
Also a significant part of that times serial killer profiling was that killers would kill within their own race, if it was all a hoax they would 100% say that the scary black psychos were slaughtering the pure white women.
It was definitely a weird phenomenon that seems to have slowed down significantly in recent years
This is also one of the understated things in this thread; crime is romanticized (& 'worthy of exploration') when done by whites and trashy when done by people of color.
It's like how some people still believe the Italian mafia has "a code" against drug trafficking, and thus romanticize their nobility -- except it was because they had no hope of breaking into an area already dominated by other criminal groups, not morality. They basically got rejected and said "lol well I didn't want to fuck you anyway".
There is an element of that but there is also an element of serial killers being perceived as greasy oddballs with no friends or social skills