I mainly associate it with online Maoists from like, the 90s/early 00s. The kind with weird, Geocities-quality web pages filled with reams of manifestos (manifesti?). I always preferred "United $nakes", which is amusingly evocative.Starthrower is correct. Life is VERY different from what is on TV. The vast vast vast vast vast majority of people (of ALL races) go about their days and nights without any fear of getting shot. There is NOT a war against black people here in America. And to spell it "AmeriKKKa" is wholly innacurate, ignorant, and insulting.
As someone who lives in a city, it's amazing how many people think I must fear for my life every day, or that the city has burned down. I don't (my friends in Portland get even more amusement about national news stories about the supposed hellscape they live in). Local news is bad about this too- as they say, "if it bleeds, it leads"