He was certainly above that. Hell his story “Facts Concerning the Late Arthur Jermyn and His Family” also known as “White Ape”. Is literally a book about the “one drop rule” to the point its actually funny because of how absurd it comes off as. Its so insanely racist, it fucking becomes funny based on the character’s reaction. Its not a great short story but basically he find out his great great great great grandmother was a “white ape” (which is not human per say but lets read between the lines since the white apes come from the congo region), his response to this news was pouring gasoline on himself and burning himself alive. Like yes its fiction but the fact he made a fucking short story where the focal point is discovering that you are mixed race and learning that is so mind breaking, death was the only logical option is god damn hilarious.