A lot of different “communities” with scores to settle?
Yes.
Once again my theory that various peoples and ethnic groups around the world do okay when kept in different areas but then when they confront each other there is war and attempts at genocide.
Called “segregation.”
African tribes killing each other. Mau Maus and Rhodesians slaughtering Europeans.
Decades of Jews and Arabs clashing unless staying away from each other with agreed upon lines of borders.
When Yugoslavia’s communist hold was broken the 1000 year old hatred among the types flashed again. The 1992 Croat-Bosnia War and others. Some people buried rifles and ammunition in the 1940s to dig up when the fighting started again decades later. Wars such as Serbians vs. Croatians from 1991-1995.
European settlers confronted by tribes of “Indians” in the US.
Cities in the US with 1960s riots followed by “White Flight” and the division between suburbs and urban core.
Too many others to mention.