American Jews, Chinese food and Christmas: The first connection was a 1935 gift of chow mein to a New Jersey orphanage

There is a meme that circulates every holiday season, an image of a sign in a restaurant window. “The Chinese Restaurant Association of the United States would like to extend our thanks to the Jewish people,” it says. “We do not completely understand your dietary customs … but we are proud and grateful that your GOD insists you eat our food on Christmas.”

Is the sign real? Perhaps not; the fact-checking site Snopes found no evidence of the association even existing. But the joke’s popularity...