Source: Timeline
Eugenio Pacelli and the Jews of Frankfurt - Feb. 8, 1919
Feb. 25, 1919 Gasparri replies to Pacelli about the reported pogroms in Poland, conveying a report from Vatican diplomat Achille Ratti (later Pope Pius XI, 1922-39) minimizing the pogroms and stating how “incredibly numerous” Jews are in Warsaw.
English translation
Feb. 25, 1919 Gasparri to Pacelli:
Most Illustrious and Reverend Signore,
Your Most Illustrious Excellency’s Report No. 12015, of February 8th, reached me in due course, on the subject of the transmission of a Memorial directed by various Jewish persons and societies of Frankfurt on Main to the Bishop of Fulda, for the purpose of obtaining the good offices of the Holy Father; to bring an end to the cruelties that are said to have been committed up to now against the Hebrews in Poland and Galicia.
Already in December last year the Holy See had involved in this matter Monsignor Ratti, Apostolic Visitor in Poland, who thus wrote me from Warsaw, dated this January 15th:
Concerning the pogroms and excesses against the Jews, about which Your Most Reverend Eminence sent me his venerated encrypted cable, it has however occupied me and I am occupying myself and already have some documents in hand; but nothing up to now is very clear and definitive. In Warsaw, certainly, nothing has happened, I say nothing of any importance and seriousness, the Hebrews there are incredibly numerous (300 thousand!), they are abhorred there, but not molested, much less persecuted.
In Kielce, on the 11th and 12th of November 1918, there were serious riots against the Hebrews, of whom four were mortally laid low, 250 injured or badly beaten up. I have before my eyes the minutes of a session of that city council on the first of December: the Hebrews gave blows to the Christians, the Christians to the Hebrews; I expect further information soon…