To be fair, the name of Lovecraft’s cat was the tip of the iceberg when it came to him. I love the world building he did, but it’s kind of hard to read a lot of his stories filled with big-lipped, dark savages. On the other hand, with Lovecraft, it seemed less a case of “white people are superior” and more a case of “all of humanity deserves to be thrown into the hellbeast pit, but white people should be thrown in last,” which is… still racist, but I guess not supremacist exactly?
Apparently his Jewish wife occasionally had to remind him who he married when he would go off on an antisemitic tirade, which I find quite amusing.