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Klein got her PhD from New York University before joining Chapman University in 2012. In 2018, her bookItaly's Jews from Emancipation to Fascism won the double finalist for the National Jewish Book Award. She teaches the history of Jews, Europe and the Holocaust at her university.
In February 2023, Klein and Jan Grabowskipublished the 57-page article Wikipedia's Intentional Distortion of the History of the Holocaust in The Journal of Holocaust Research in which they said to have found widespread distortion of Poland's Holocaust history on English Wikipedia, which involved the exaggeration of Jewish collaboration with Nazi/Soviet occupiers, invention of Jewish "war crimes" against Poles, downplaying of Polish collaboration with Nazi/Soviet occupiers and blaming Jews for their own suffering in the Holocaust.
Klein and Grabowski also criticized English Wikipedia's administrators and the Wikimedia Foundation's lack of will to handle, leaving the site vulnerable to disinformation:
Wikipedia's administrators have largely failed to uphold Wikipedia’s policies [. ...] unable to deal with the issue of persistent distortion [...] Wikipedia's articles [...] have become a hub of misinformation and antisemitic canards.
Myth 1: "3 million non-Jewish Poles were killed in WWII." Fact: The number was claimed in 1946 by Jakub Berman, the head of the Polish communist secret police, to create a false equivalence between Jewish and Polish victimhood. The death toll of non-Jewish Poles was 1.8 million as per the most recent estimates.
Scale of helping Jews
Myth 2: "Thousands of Poles were executed for helping Jews." Fact: 800 Poles were executed for helping Jews as per the most recent estimates.
Scale of hiding Jews
Myth 3: "450,000 Poles hid Jews in their houses during the Holocaust." Fact: The number was promoted by Władysław Żarski-Zajdler, a writerpropagandizing for the Polish communist regime during the 1968 antisemitic campaign. Fewer than 30,000 Polish Jews survived the Holocaust.
Scale of Polish collaboration
Myth 4: "<1% Poles collaborated with Nazi occupiers." Fact: Several independent research showed otherwise.
Polish Blue Police
Myth 5: "Many Polish Blue Police were executed for refusing to follow Nazi orders to arrest Jews." Fact: Proven cases have not been found by mainstream historians yet. Instead, the Polish Blue Police helped Nazi occupiers kill Jews enthusiastically.
Polish Underground State
Myth 6: "The Polish Underground State's court investigated 17,000 suspected Polish collaborators and sentenced 3,500 to death." Fact: No more than seven collaborators were sentenced to death by the Polish Underground State's court, despite desperate requests from the Committee to Aid Jews (Żegota).
Policies against helping Jews
Myth 7: "Poles were specifically targeted by the Nazis for helping Jews. The Nazis imposed death penalty on Poles because of this." Fact: Nazi laws against helping Jews were applied equally to millions of non-German subjects under Nazi occupation. The death penalty was introduced on October 15, 1941, long before any obvious help could have been noticed.
Revelation of the Holocaust
Myth 8: "Polish Army officer Witold Pilecki told the Allies about the Holocaust via Polish government-in-exile courier Jan Karski." Fact: Jan Karski did not tell the Allies about the Holocaust. Karski left Poland in fall 1942, while Pilecki did not write a report about the Holocaust until summer 1943, when most Polish Jews had already been killed. Pilecki could not have given Karski a report that did not exist when Karski left.
Nazi reprisals against Poles helping Jews
Myth 9: "The Nazi murdered 20,000 Polish villagers in Białka over some of them helping Jews." Fact: It is true that individual shootings of Białka's Polish villagers happened, but the confirmed death toll was 96.
Post-war pogroms against Jews
Myth 10: "The July 1946 Kielce pogrom was planned by the Soviet occupiers." Fact: The claim has been roundly rejected by mainstream scholars, including Joanna Tokarska-Bakir who won the 2019 Yad Vashem International Book Award for a book that disproved the claim, which is only held by some Polish nationalists and conspiracy theorists.
Selected works
Books
2020s
Klein, S.; Levitsky, H.; Mueller, A.; Aarons, V.; Painitz, S.; Kaminsky, A.; Lander, J.; Mostowski, L.; Nadel, I.; Omer-Sherman, R.; Grinberg M. The Holocaust Across Borders: Trauma, Atrocity, and Representation in Literature and Culture, Rowman & Littlefield, 2021.
2010s
Klein, S. Italy's Jews from emancipation to fascism, Cambridge University Press, 2018.
Articles
2020s
Klein, S. (2025). The Growing Rift between Holocaust Scholars over Israel/Palestine. The Journal of Genocide Research, 1‒21.
Grabowski, J. & Klein, S. (2023). Wikipedia's Intentional Distortion of the History of the Holocaust. The Journal of Holocaust Research, 37(2), 133‒190.
2010s
Klein S. (2019). Review of Levis Sullam, Simon, The Italian Executioners: The Genocide of the Jews of Italy.
Klein S. (2018). Using Wikipedia in Israel Studies Courses. Israel Studies Review, 33(1), 102‒109.
Klein S. (2017). Challenging the Myth of Italian Jewish Assimilation. Modern Judaism-A Journal of Jewish Ideas and Experience, 37(1), 76‒107.
2000s
Klein S. (2008). An Army of Housewives: Women's Wartime Columns in Two Mainstream Israeli Newspapers. Nashim: A Journal of Jewish Women's Studies & Gender Issues, 88‒107.
↑Karyn Ball and Per Anders Rudling, “The Underbelly of Canadian Multiculturalism: Holocaust Obfuscation and Envy in the Debate about the Canadian Museum for Human Rights,” Holocaust Studies, vol. 20, no. 3 (2014): pp. 33–80.
↑C. Łuczak, “Szanse i trudności bilansu demograficznego Polski w latach 1939–1945,” Dzieje Najnowsze 2 (1994): pp. 9–15.
↑Ryszard Walczak et al. (eds.), Those Who Helped: Polish Rescuers of Jews During the Holocaust (Warszawa: IPN, 1997).
↑Martyna Grądzka-Rejak and Aleksandra Namysło, (eds.), Represje za pomoc Żydom na okupowanych ziemiach polskich w czasie II wojny światowej, vol. 1 (Warsaw: IPN, 2019), p. 464.
↑Richard C. Lukas, Out of the Inferno: Poles Remember the Holocaust (Lexington: University Press of Kentucky, 1989), p. 15.
"The Stalinist roots of "left" anti-semitism". Workers' Liberty. April 28, 2011. Retrieved October 6, 2024. In the 1970s the rulers of the USSR launched a sustained 'anti-Zionist' campaign, in fact anti-semitic [...] much of what many British and international leftists [...] say about Israel is an indirect and unwitting copy of the Stalinists' efforts at constructing a Marxist-sounding gloss on old anti-semitic themes [...] an anti-semitic show-trial was due to be staged, in which five Jewish doctors from the Kremlin's own hospital were to face charges of poisoning and plotting.{{cite web}}: CS1 maint: deprecated archival service (link)
Bash, Dana; Sharpe, Abbie (May 1, 2022). "In 1968, Poland's communist government forced Jews to leave. Today, the country embraces refugees". CNN. Archived from the original on October 5, 2024. Retrieved October 6, 2024. But Poland's tiny Jewish population diminished even further in 1968, when the communist government forced thousands to leave the country in an anti-Semitic purge [...] Scapegoating the Jews was a tried-and-true tactic used by leaders for millennia, and it worked just as the communists [...] After Israel's victory over its Arab neighbors in 1967's Six-Day War, Poland's communist party leader Władysław Gomułka spoke out against a "fifth column" of Polish Jews, in what became known as the "Zionist" speech – evoking a wave of anti-Semitism...some 13,000 Polish Jews who were given a one-way ticket out of his country.
↑Natalia Sawka, “Antysemita Leszek Żebrowski poprowadzi wykład o ‘żołnierzach wyklętych,’” Gazeta Wyborcza, March 1, 2016
↑The “Israeli War Crimes Commission” statistics seem to originate from an essay from the 1960s by one Leo Heiman, which provides no footnote. Leo Heiman, “Ukrainians and the Jews,” in Ukrainians and Jews, Articles, Testimonies, Letters and Official Documents Dealing with Interrelations of Ukrainians and Jews in the Past and Present: A Symposium (New York: The Ukrainian Congress Committee of America, 1966), p. 60.
↑Machcewicz and Persak, (eds.), Wokół Jedwabnego; Jan Grabowski and Barbara Engelking, (eds.), Dalej jest noc: losy Żydów w wybranych powiatach okupowanej Polski (Night Without End: The Fate of Jews in Selected Counties of Occupied Poland), 2 vols. (Warsaw: Polish Center for Holocaust Research, 2018).
123Engelking and Grabowski, (eds.), Dalej jest noc; Grzegorz Rossolinski-Liebe, “Polnische Bürgermeister und der Holocaust im Generalgouvernement Besatzung, Kollaboration und Handlungsmöglichkeiten,” Bulletin des Fritz Bauer Instituts, (2021), pp. 26–35.
12Andrzej Żbikowski, Polacy i Zydzi pod okupacja niemiecką, 1939-1945: Studia i Materiały (Warsaw: IPN, 2006), pp. 482–84.
123The Third Decree of General Governor Hans Frank concerning restrictions on residency in the Generalgouvernement and introducing the death penalty for aid rendered to Jews, October 15, 1941; Verordnungsblatt für das Generalgouvernement. Dziennik Rozporządzeń dla Generalnego Gubernatorstwa, Cracow, October 25, 1941, p. 595.
12345Adam Puławski, “Revisiting Jan Karski’s Final Mission,” Israeli Journal of Foreign Affairs, vol. 15, no. 2 (2021): pp. 289–97; Adam Puławski, Wobec niespotykanego w dziejach mordu. Rząd RP na uchodźstwie, Delegatura Rządu RP na Kraj, AK a eksterminacja ludności żydowskiej od wielkiej akcji do powstania w getcie warszawskim (Chełm: Stowarzyszenie Rocznik Chełmski, 2018).
↑Geoffrey P. Megargee, ed., Encyclopedia of Camps and Ghettos, 1933-1945, vol. 1: Early Camps, Youth Camps, and Concentration Camps and Subcamps under the SS-Business Administration Main Office (WVHA) (Washington: United States Holocaust Memorial Museum, 2009), p. 692.