How very odd, Nyarlathotep's human form is supposed to be a tall man with black skin.
Really? Huh.
*link NSFW due to language.
I believe in that story where he was a tall man with black skin, it was described as not with Negroid features. But anyway it is as someone said earlier. Nyarlathotep assumes thousands of forms. As to Lovecraft having racist tendencies. it is pretty much documented. He was a product of his time, anyhow.
That said. stop reading Lovecraft stories. everybody! You'll lose your sanity
In Lovecraft's partial defense, he WAS very much a product of his time and place, growing up in northern New England. His journals reveal that, after living in New York, his views toward other races became more enlightened.
Nobody escapes their upbringing. No matter what we do, we will always be influenced by it. The most we can do is recognize and account for that influence in our thoughts and actions.