Nope, this is not a joke, its an actual real publication from the Smithsonian National Museum of African American History and Culture:
Apparently rational linear thinking, stable families, a work ethic, and showing up on time are signs of whiteness.
If you can't figure out the racist absurdity of their publication, well, there's not much I suggest except, that in the words of Chief Justice John Roberts: The way to stop discrimination on the basis of race is to stop discriminating on the basis of race.
That it's the flippin' Smithsonian Institution publicizing this racist nonsense and classifying successful traits as White is rather insane.
In short, I'm not sure if the museum hired a Black Klansman to draw this up, as if successful traits are identified as being White, I'd really hate to see what they come up and describe as Black cultural traits.
This idiotic graphic is classifying and identifying traits that make one successful in the modern world as being White cultural traits.
I expect Asians including the Japanese, Koreans, and Chinese would beg to differ and object vociferously that their mastery of these traits somehow makes them White. Heck, I'd expect Nigerians and other successful African immigrants that embrace these successful cultural traits would similarly object to them being classified as "White".