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ADL report finds ‘clear evidence’ of anti-Israel bias among Wikipedia editors

Wikipedia, assumed to be a reliable source, “has become a biased platform manipulated by agenda-driven editors,” CEO Jonathan Greenblatt said.

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Keyboard typing. Credit: fancycrave1/Pixabay.

The Anti-Defamation League on Tuesday released a comprehensive report outlining anti-Israel bias among Wikipedia editors, “including clear evidence of a coordinated campaign to manipulate Wikipedia’s content related to the Israeli-Palestinian conflict.”

“Most readers assume Wikipedia is a reliable online encyclopedia, but in reality, it has become a biased platform manipulated by agenda-driven editors on many topics,” said Jonathan Greenblatt, CEO and national director of the ADL. “Recent Wikipedia efforts toward neutrality are nothing but a Band-Aid on a problem that’s getting worse, with persistent antisemitic and anti-Israel bias still far too present.”

In its research, the ADL found “clear evidence” that a group of some 30 editors coordinated to deliberately “introduce antisemitic narratives, anti-Israel bias and misleading information,” the report stated. They discovered these editors were over twice as active on the site compared to other Wikipedia editors and communicated with each other 18 times more when compared to other editor group communications. The ADL also found that edits increased dramatically following the Hamas-led terror attacks in southern Israel on Oct. 7, 2023.

“We urge Wikipedia and policymakers to act quickly before rampant disinformation on one of the most visited sources of information leads to tragic consequences,” Greenblatt said.

Additionally, the report found evidence of extremist, pro-Hamas content in the Arabic-language edition, as Wikipedia’s rules are not applied consistently outside of some English-language pages.

“It’s clear that Wikipedia needs to do far more to address the very active antisemitic and anti-Israel bias and coordination,” said Daniel Kelley, interim head of the ADL Center for Technology and Society. “And until then, other platforms that rely on Wikipedia as a source—from Google Search to large language models like ChatGPT—must deprioritize Wikipedia’s content on issues related to Jews, Israel and the Middle East conflict so they do not perpetuate this bias.”

A Combat Antisemitism Movement analysis found that the 16-page resource instructs students on discussing Gaza and Palestinian advocacy while neglecting key historical context and leaving antisemitism undefined.
A congressman on the House Armed Services Committee confirmed the proposal to JNS.
The independent executive branch agency told JNS that the behavior is “not acceptable” and the incident is being “fully investigated.”
“It can’t just be business as usual,” Evan R. Bernstein told JNS. “We’re not done yet.”