This is all another blatant forgery. Man - I had to read a LOT being raised as a Catholic back in the time where Latin was still involved in our classes...
Libbre David 37: “To communicate anything to a Goy about our religious relations would be equal to the killing of all Jews, for if the Goyim knew what we teach about them, they would kill us openly.” This is another blatant forgery. This one has been spread at least for a century; there is an article from 1939 about antisemitic Talmud forgeries, which lists this specific one in particular on p.15
It is when the citations are specific and drawn from genuine sources that comparisons become possible. It is then that the falsification unfolds in all its brazenness. Repeatedly, for example, Libbre David 37 is cited as the source for the state-ment: "If a Jew be called upon to explain any part of the Rabbinic books, he ought to give only a false explanation. Whoever will violate this order shall be put to death." There is no such Hebrew word as Libbre. What is obviously meant is Dibre David. It is interesting that the corruption Libbre David follows the misprint of the German original (a pamphlet quoted by Bloch, Israel and the Nations, page 4). Several books by the name of Dibre David were published, the earliest in 1671 and some as late as the nineteenth century. Strack (Geheimgesetze, page 6) took the trouble to search all books by that name and pronounced the text a complete and unadulterated forgery. No such passage or any passage expressing such sentiments is to be found in any of these books.
I strongly encourage you to read the whole article about Talmudic forgeries. It's only 17 pages. It explains the long history of these fake quotes and debunks them, both in specific detail and generally.
