Coda: American and English writers such as A. Conan Doyle, Ernest Hemingway, Jack London, Agatha Christie, Charles Dickens, and F. Scott Fiztgerald used subtle or overt language to ensure the reader knew the character was Jewish: e.g. "Hook-nosed" or "beady eyed." Everyone knew that the "Napoleon of Crime" -- by narrative description -- Professor Moriarty -- was Jewish. This was a needless aspersion, as in the case of Fagin in Oliver Twist.
What would it matter if Lex Luthor or the Joker were Jewish or Arabic?
When the comic book The Fantastic Four debuted in 1962, everyone knew that test pilot Ben Grimm -- who would become the orange rocky golem super-strong The Thing -- was Jewish. This was implicit by Stan Lee and Jack Kirby. Back then, the Comics Code prevented overt identification of one's religious denomination.
Ernest Hemingway wrote that the best thing to have ever happened to a Jewish protagonist -- a skilled pugilist from Princeton University -- was to have "his nose flattened" (The Sun Also Rises, 1926).
Shakespeare did not disparage the money-lender Shylock any further than he had to -- just as he treated England's eternal enemy -- the Irish. He ridiculed the Irish just enough during a late 17th-century insurrection just to please the London audience -- but no more. (Nota Bene: Jews were expelled from England in 1290 and were finally allowed to return to Old Albion in 1656 under authoritarian Oliver Cromwell, years after the Bard of Avon's short life (23 April 1564 - 23 April 1616).
To his immortal credit, New York City writer Damyon Runyan did not disparage other ethnicities or races in his canon of work. When Runyan wrote stories which included the character "Big Nig," everyone realized the colorful individual was an "HBM" (huge black male). But this was not a slur on "Big Nig" and his character was not maligned. This "HBM" was accepted in the mostly white and rowdy Broadway crowd, part of Gotham's tapestry, just like Nicely-Nicely or Sky Masterson.
He probably pulled the wings off flys in his youth.
He probably had someone else do that for him too.