What the hell is this fucking article even talking about? Silicon valley hires THOUSANDS OF BLACK CODERS from India every year. Some anthropology: The modern day Dravidians are descendants of the Harappan civilisation. WHOSE SETTLERS CAME FROM AFRICA DURING THE BRONZE AGE AROUND 3000 BC. Another fucking shill article by H1B lobbyists to try to lower wages to middle class americans. Class war at its best.
At best, they're ignorant of the fact that the word "anti-semitic" is not defined literally but rather defined by the historical, sociological, cultural, and linguistic context in which it was minted and used over the intervening years.
But usually the folks who say those things tend to have other, totally unrelated problems with the Jewish people. They were just making a point about people's sloppy word usage — really!
So it is for "black" when used in the racial sense, at least in the US. It is not as simple as black = genetic ancestors from Africa.
Somehow I suspect you understand this...somehow.