Often because economic mobility isn't created afterwards, certain individual agents within those various ethnic groups become the new bourgeoisie
You can see how this happened in Africa after it (mostly) shrugged off the yokes of various white european oligarchs only to replace them with oligarchs of the same skin color as the rest of the population, who then went to further racial tensions between the various minority groups
True racial solidarity IS achievable but you have to democratize the system and allow a much more even playing field in terms of economic mobility, no one group should be in abject poverty moreso than another and likewise no one group should be more the richer>>115280615
It never had a "ban"
It has been canonized since the 1910s that the US can make as much propaganda as it wants on any number of subjects
Trump, Obama, the Bushes, Clinton were all merely continuations of an already fucked-up system
You're just noticing it because you're looking now while it's repeating