Intriguingly, also, RaHoWa, which is the other poster-kid for horrible racist RPGs, is fairly easy to fix into
a rules-light high-lethality game about gang warfare. It basically had no problems other than "Melee combat doesn't quite work", "The way that rolling and difficulty work is weird" and, uh, well, "You play as the Klan".
I'm jokingly working on a game called LETHAL ("Less Evil Tabletop Heroism and Love") which is like a FATAL fix, but since FATAL is literally 25 or so times as long as RaHoWa, it's going to be more difficult. Still, I've found more things than I thought I would that I liked about it, from the fairly detailed (if sometimes horrible) characterisations of the different races and parts of the setting, to the before-their-time note in the section on gender saying, paraphrased, "We're aware that sex and gender are not the same and that trans people exist. We're using gender to refer to sex because we talk about the other kind of sex, ie sexual intercourse, a lot and it would get confusing, sorry."
I literally stopped reading and showed it to my boyfriend because I was just that impressed that that passage of text existed. This was written back in 2004, before trans people had begun to show up on most people's radar yet (giving them the confusing idea that we suddenly started existing in the 21st century). That level of actual awareness at that point in time was remarkable. To have the temerity to put it in your magnum opus was incredible. To the most horrible man in the world, my hat is off.