Kindly learn the plural of negro.
When “black is beautiful” was a fresh new slogan I went to a concert that had a black comedian (not a good one) before the musical groups.
The guy said “I hate it when they call us a negro. A negro.(sneering). As in I just banged my knee real bad and look at my knee grow.”
A woman a couple of seats from me said aloud: “Shutup. Remember the name they used to call us!” Several audience members laughed with her.