What the justices decide to do in this case and a related one it heard Tuesday is important particularly because the companies have been shielded from liability on the internet, allowing them to grow into the giants they are today.
In Wednesday’s case, the family of a man killed in the Reina nightclub attack in Istanbul sued Twitter, Facebook and YouTube parent Google under the terrorism law. Nawras Alassaf’s family members, who are U.S. citizens, say the companies aided and abetted the attack because they assisted in the growth of the Islamic State group, which claimed responsibility for the attack. A lower court let the lawsuit go forward.
The platforms argue that they can’t be sued because they did not knowingly or substantially assist in the Reina attack. If the justices agree, they don’t have to reach bigger questions about Section 230 of the Communications Decency Act and whether it protects platforms when they recommend content.