they've been called a word that translates to "black" or dark skinned but the "black" that we use today, pioneered in the USA is more expansive/inclusive and much different and the one that has gone global. This is why africans, tons of west indians and latin americans are shocked when they come to the USA and find out they're "black" or just exactly how great the range of what people who identify as "black" in the USA can look like because "black" in the usa while having a bases in phneotype is more about african descent and state of mind regardless of your look
Black ethno racial consciousness has existed already in every single society where african slavery or colonialism has taken place. You posted a string of etymological diatribes about non AA's apparently not knowing they were "black" until coming to the United States when using the term "black" as a mainstream cultural identifier didn't even hit the United States until the 60's.
When African Americans of previous generations called themselves Negros, or Coloured or what have you did you think that made them any less aware of the social status of themselves and people who looked like themselves in a predominantly white societies all around the world and the cultural ties that held them together as a community? Are African Americans gifted with a degree of sentience that other negroes aren't?
They just had different ways of describing what was the same exact thing: A trans-ethnic and trans-nationalistic marker of identity for those who are descended from Africa and victims of the global system of white supremacy. And this is disregarding the fact that many black communities outside of the U.S. starting heralding the idea of black consciousness using that literal word decades before African Americans. Afro-Arab scholar Al Jahiz who was born in 7th Century Iraq wrote an entire book on what it meant to be black. The affirmation of black identity is stated explicitly in the first few lines of the Haitian Constitution. In the 1930s Francophone black countries in Africa and the Caribbean had the Negritude,( or "the Blackness" movement in English) propelled many independence movements for the continent. Etc.