The more I learn about Asperger's syndrome, the more I'm convinced Lovecraft had it. Regarding Lovecraft's racism - yes, he had his prejudices - but so did our grandparents and great grandparents who also lived in that era. The fact is though, he was willing to learn and grow. He married a Jewish lady, Sonia Greene; and even though their marriage ended in divorce, it was due to the financial stress of the great Depression, rather than to his bigotry. Many of his friends, such a Robert Bloch, were Jewish. He was even friends with the openly homosexual poet, Hart Crane. Later, as Lovecraft came out of his shell, his racial views became much more tolerant, embracing something of what today may be termed a multiculturalism. Especially after he learned about Hitler's ugly racial policies in action, from a friend who had traveled to Germany.
His political views, which had earlier been right wing conservative, with all the class prejudice that comes with it, gave way to a very liberal, if not even socialist viewpoint once he was personally hit by the depression. An incident which ended his worship of the upper classes came when one of his aunts had arranged a lunch with local well to do business leaders. Lovecraft went away feeling they were the dullest, most unintellectual people he had ever met. A good source to read up on this would be Lovecraft: A Biography, by the late L. Sprague De Camp. I believe it's out of print, but it can still be found.
Another probable Aspie was Lovecraft's friend and fellow pulp writer, Robert E. Howard, who gave the world Conan the Barbarian. De Camp and co-writers had produced a Howard biography entitled, Dark Valley Destiny, which I believe may be easier to find. Also an important read is One Who Walked Alone, by Novalyne Price Ellis, who had been Howard's girlfriend. This book had been the basis of the movie, The Whole Wide World, starring Vincent D'Noffrio as Howard.
-Bill, otherwise known as Kraichgauer