Enlarge (credit: NurPhoto / Contributor | NurPhoto )

A key protection shielding social media companies from liability for hosting third-party content—Section 230 of the Communications Decency Act—is set to face its first US Supreme Court challenge.

The question before the court hinges on whether Google-owned YouTube is responsible for aiding and abetting ISIS terrorists by actively recommending ISIS videos to users via its algorithms.

According to plaintiffs , ISIS allegedly relied on YouTube during efforts to ramp up recruitment before the terrorist group took credit for killing 130 people and injuring more than 350 others during six coordinated attacks in 2015. The lawsuit now headed to the Supreme Court focuses on the killing of an American woman named Nohemi Gonzalez, who was dining in a Paris bistro when ISIS militants attacked.