Was 4chins always racist, or was it only ironically so?
The real damage done by pol is more subtle than that.
The old internet really was white-bread first world white and greater than averagely educated. Nobody was insecure about being an ESL amerimutt, so conversations as well as humor were free to be about other more interesting topics. Racial stereotypes were just spicy elements to the overall flavor.
Since few americas are secure in their identity, they must constantly sperg about racial identity at the cost of everything else. Engaging in white supremacy because they simply can't live up to the hegemonic ideal of whiteness, putting them in a state of schizoid tension, and paranoia.
Zoomers are so afro-negroid that they're confused, resorting to perming their hair like an afro in order to fit in with their black-coded environment.
With zoomers and ESL dragonball zed fans now making up most of the Internet's user base, no board or thread will every truly be comfy ever again.