Do you mean like the Uyghurs in China, or the Armenians in Turkey in 1915, or the Tutsis with the Hutus, or the Christians in Iraq, or the Indians in Qatar/UAE/Saudi Arabia, or the Jews in Eastern Europe in the 19th century & Germany in the 20th, or blacks sold as slaves by Arabs (for many centuries and still today), or the (too many) examples like that?
Yep, these horrible events happen when people are obsessed with race. Which is easily avoidable in real life, if we consider that there's just one human race.
As for the black segregation in the USA, it's specific to the USA. Poland never had that. Most European countries didn't have segregation either.
The 90s were a freaking paradise. I don't just say that cause it's my childhood.
Today's environment has nothing to do with the 90s. The 90s were about equality of opportunity and color blindness. The 2020s are about equality of outcome (which is pure madness) and race obsession.