Because it's an anti-black, white supremacist inspired take. African is genetically the most diverse continent on Earth. Its so diverse that Middle Easterns and Europeans are genetically more related to each than West Africans and South Africans are. Some claiming to be able tell the different between Africans and FBA either doesn't get out much and/or pulling from cac definitions of what an African is supposed to look like.
Can you tell a white American from an Irish/german/russian/Italian?
How about an Asian American vs chinese/indian/Filipino/Korean?
We never hear cacs say this about cacs. I've heard latinos say this about other latinos like Peruvians or central Mexicans... but the ones saying that are always white washed and future cacs.
The foundation on this hedges on the fact that we have a significant amount of European features in our DNA while most Africans do not. So saying you can tell an African from FBA is a round about why of saying "We are more cac them Africans". If you've seen ppl mistake African black/white biracials for FB, you'll know what I'm talking.
Some nikkas take it too far, like Tariq, and believe their proximity to cacness makes them superior to other skin folk around the globe. If you've seen
I'm the perfect example of why this line of thinking is flawed. No one in my genetic history was born on and island, except England. My Black ancestors were among the last slaves to be brought over by ship to America. My white ancestors came over from England in the middle 1800s. I'm 80% African 12% cac and the rest native american. I've got genetic reports and census papers to prove it.
But people swear up and down I'm Nigeran or from Haiti. And my relatives who are mostly lightskinned on both sides. Race doesn't exist, no one knows wtf they are talking about when the claim to be able to tell someone's race by their features. Biracials and mixed race people debunk that claim.