Good thing Wikipedia articles are always the best researched and sourced!
In 2023, Jan Grabowski and Shira Klein published an article in the Journal of Holocaust Research in which they said they had discovered a "systematic, intentional distortion of Holocaust history" on the English-language Wikipedia.[367] Analysing 25 Wikipedia articles and almost 300 back pages (including talk pages, noticeboards and arbitration cases), Grabowski and Klein stated they have shown how a small group of editors managed to impose a fringe narrative on Polish-Jewish relations, informed by Polish nationalist propaganda and far removed from evidence-driven historical research. In addition to the article on the Warsaw concentration camp, the authors conclude that the activities of the editors' group had an effect on several articles, such as History of the Jews in Poland, Rescue of Jews by Poles during the Holocaust and Jew with a coin. Nationalist editing on these and other articles allegedly included content ranging "from minor errors to subtle manipulations and outright lies", examples of which the authors offer.[367]
367: Grabowski, Jan; Klein, Shira (February 9, 2023). "Wikipedia's Intentional Distortion of the History of the Holocaust". The Journal of Holocaust Research. 37 (2): 133–190. doi:10.1080/25785648.2023.2168939. ISSN 2578-5648. S2CID 257188267.