Wikipedia Editing Bias Alleged by Anti-Defamation League

A new report by the Anti-Defamation League (ADL) claims that a coordinated group of editors has been manipulating Wikipedia articles related to Israel, Jews, and the Israeli-Palestinian conflict. The report, released over a year after the ADL first identified the group of approximately 30 editors, alleges that these individuals have systematically altered information to present a biased narrative. While some editors have been banned or restricted by Wikipedia's arbitration committee, the ADL argues that the changes they made often remain uncorrected.

One specific case highlighted involves an editor, identified as Iskandar323, who was eventually banned from the site. The ADL found that of 382 edits reviewed, 346, or about 91%, remained in place even after the editor's removal. This editor had previously removed extensive details from the main Hamas article, including information on antisemitism, human shields, and child soldiers, moving it to a separate, less-viewed article. Similar actions were noted in articles on the Gaza war, Zionism, and the October 7th attacks, where graphic descriptions of atrocities were downplayed or removed.

The report also details ongoing disputes over the wording of articles, such as the description of the October 7th attackers "breaching" from a blockaded Gaza Strip, and the persistent addition of "according to reports" to descriptions of sexual violence, despite UN findings supporting the occurrence of such acts. The ADL points to the article on the kidnapping and deaths of the Bibas family as another example, where an un-suspended editor allegedly removed phrasing stating they were murdered and initiated discussions questioning the evidence.

While the ADL observed a decrease in overt coordination among the original group of editors, they identified 19 accounts they believe continue to promote bias. The report suggests that Wikipedia's volunteer-driven model allows problematic edits to persist for years, even after editors are removed. The ADL is calling for private verification of editors' identities on sensitive topics, limitations on anonymous editing, and for search and AI companies to disclose when their information comes from Wikipedia and to update their systems accordingly. They also urge Wikipedia to systematically review past edits by banned users.