LogFAQs > #961760305

This is copied from his Wikipedia page; https://en.wikipedia.org/wiki/H._P._Lovecraft#Race

Race is the most controversial aspect of Lovecraft's legacy, expressed in many disparaging remarks against non-Anglo-Saxon races and cultures in his works. As he grew older, his original racial worldview became a classism or elitism which regarded the superior race to include all those self-ennobled through high culture. From the start, Lovecraft did not hold all white people in uniform high regard, but rather esteemed English people and those of English descent. In his early published essays, private letters and personal utterances, he argued for a strong color line to preserve race and culture. His arguments were supported using disparagements of various races in his journalism and letters, and allegorically in his fictional works that depict non-human races. This is evident in his portrayal of the Deep Ones in The Shadow over Innsmouth. Their interbreeding with humanity is framed as being a type of miscegenation that corrupts both the town of Innsmouth and the protagonist.
Initially, Lovecraft showed sympathy to minorities who adopted Western culture, even to the extent of marrying a Jewish woman he viewed as being "well assimilated". By the 1930s, Lovecraft's views on ethnicity and race had moderated. He supported ethnicities' preserving their native cultures; for example, he thought that "a real friend of civilisation wishes merely to make the Germans more German, the French more French, the Spaniards more Spanish, & so on". This represented a shift from his previous support for cultural assimilation. However, this did not represent a complete elimination of his racial prejudices. Scholars have argued that Lovecraft's racial attitudes were common in the society of his day, particularly in the New England in which he grew up.

He doesn't sound like "The KKK's Grand Wizard of the Year", but more like a product of his times and upbringing.