when it comes to africa for example i was taught that they're poor cause their land isn't harvestable or some bullshit like that, and then i find out as an adult it's actually cause western countries fucked the shit out of them and huh that makes a lot more sense
oh yea definitely, but even that racism is closely associated with the class issue
remember, the irish were basically treated like the "black people of europe" when they were the colonized/lower classes, in fact the "racial scientists" (phrenologists and the like) used to argue the irish brain was similar to the african brain and therefore they were also "made to serve", to "work with their hands", etc
as ireland became independent and started rising up as a 1st world country this no longer served a purpose and sounds absurd to us, but it was very real and deeply believed in up until the late 19th century or so
so that racism exists, but it's also built upon the need to dehumanize the lower classes so we can justify their conditions (though of course when this takes root in society it starts working at a subconscious level)