Twitter, Inc. v. Taamneh
Headline: Decision blocks terrorism victims from holding major social-media companies liable for an ISIS nightclub attack, finding general hosting and recommendation algorithms did not amount to knowingly aiding and abetting that specific attack.
Holding: Plaintiffs' aiding-and-abetting claims fail because the social-media companies did not, as pleaded, knowingly provide substantial assistance to the Reina nightclub attack and therefore are not liable under the Antiterrorism Act.
- Makes it harder for terrorism victims to sue social-media companies under the Antiterrorism Act.
- Requires plaintiffs to allege intentional, substantial assistance tied to a specific attack.
- Reserves different outcomes where platforms provided targeted, knowing support for terrorism.
Summary
Background
A family whose relative, Nawras Alassaf, was killed in the 2017 Reina nightclub attack in Istanbul sued three large social-media companies — Facebook, Twitter, and Google/YouTube — under the Antiterrorism Act. The family alleged ISIS used those platforms to recruit, raise funds, and spread propaganda, that recommendation algorithms connected ISIS content to users, and that the companies profited from ads on that content. The district court dismissed the complaint, the Ninth Circuit reversed, and the Supreme Court agreed to review the pleading question.
Reasoning
The Court asked whether the companies' conduct could be called “aiding and abetting” under the statute added by a 2016 law (JASTA). Looking to long-standing common-law principles and the Halberstam framework, the Court said a claimant must show (1) a wrongful act by the primary actor, (2) the defendant knew it played some role in the wrongful enterprise, and (3) the defendant knowingly and substantially assisted the specific tortious act. The Court accepted that ISIS committed the attack and that the companies knew ISIS used their services, but it held the complaint did not plausibly allege that the companies gave knowing, substantial aid that made the Reina attack succeed. The allegations described large-scale hosting, neutral recommendation algorithms, and some failures to remove content — not intentional, targeted support for that attack.
Real world impact
The ruling makes it harder for victims to use §2333(d)(2) to hold general communications platforms liable for terrorist acts based only on hosting, algorithmic recommendation, or failure to police content. Plaintiffs must plead a stronger factual nexus showing intentional, substantial assistance tied to the specific attack. The Court noted this was a pleadings-stage decision and that different facts might lead to different outcomes.
Dissents or concurrances
Justice Jackson concurred, emphasizing the opinion is narrow: different factual records or different allegations about targeted, knowing support could produce different results.
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