Referring to people by race in order to identify them is not necessarily racist; it depends on intent and what else you say about them at the same time.
And racial characteristics are genuine. It is a simple fact that people whose ancestry is from some (not all) African races tend to have thicker lips and wider, flatter noses than (for example) Scandinavians. (Oddly enough, this also applies to Australian aborigines although they are probably the most genetically different from Africans.) Again, mentioning this is not racist in itself, any more than using their skin tone as an identifier.
OTOH, some racial identifiers are indeed insults. The N word is an obvious example, but not the only one. The term "cracker" is an insult, for example.
And racial characteristics are genuine. It is a simple fact that people whose ancestry is from some (not all) African races tend to have thicker lips and wider, flatter noses than (for example) Scandinavians. (Oddly enough, this also applies to Australian aborigines although they are probably the most genetically different from Africans.) Again, mentioning this is not racist in itself, any more than using their skin tone as an identifier.
OTOH, some racial identifiers are indeed insults. The N word is an obvious example, but not the only one. The term "cracker" is an insult, for example.