Not only is this post WMAF/eugenics/interracial hate bullcrap, but it's also Josuke slander. I won't tolerate this

It's not to be taken seriously or even literally. The moment we are introduced to Jotaro he's in jail, and he himself later says that he beats up people, terrorized his teachers and leaves restaurants without paying. Josuke is instead a pretty normal guy who just gets triggered if you disrespect his hair