Never heard of it. Very insulting.
Now, the METS, that's the team all self-respecting Jewish people must support.
(Back in the 1960's "Met's fan" was code for "Jew". Not sure if that is true anymore. But I love my Mets. So I don't care.)
In seriousness, the upper-class English, in particular those who go to boarding schools, always have had a strain of overly-polite antisemitism. No doubt the products of these elite institutions work at OED.
As an aside, Hermine Granger (Harry Potter) was originally written as a Jewish character -- I can even post the page and line where Hagrid talks about Harry and Hagrid celebrate Christmas -- while asking about "her" holidays. The entire "mudblood" plot line was a parallel about the persecution of Jewish people. Having Hermione openly Jewish was quietly trashed by the editor/publisher -- who, undoubtedly are upper-class twits who went to school with the OED editors.
("Dentist", btw, is code for "Jewish" in England. Not sure why, but apparently lots of Jewish people are dentists in England. I guess we looked at those English teeth and saw a market. Hermione's parents are, yes, dentists.)
She resurrected this plot line a bit in the movies based in the USA -- where Jewishness was not particularly an issue.