Anti-Semitic and white supremacist terrorism is increasingly becoming a transnational threat that helps put the United States “at doorstep of another 9/11,” but stopping the threat requires education and training for vulnerable communities and clear authorities to go after extremists and their online recruitment, Congress heard.

Promoting legislation to increase DHS and social media companies’ efforts to remove online terrorist content, House Homeland Security Subcommittee on Intelligence and Counterterrorism Chairman Max Rose (D-N.Y.) stressed at a Wednesday hearing that “we have to get them to agree that Atomwaffen, The Base, and Sonnenkrieg, and Blood and Honor, and National Action and so many others are actually terrorists.”

“And in order to do that, we need you all to call them that,” Rose said. “We need the State Department to label at least some of them FTOs.”

Elizabeth Neumann, assistant secretary for Threat Prevention and Security Policy in the Office of Strategy, Policy, and Plans at the Department of Homeland Security, acknowledged “online platforms are catalyzing hate,” and domestic extremist movements “know exactly how far they can go — they’re training their people to say you can go this far, but not any farther.”

Read more: Homeland Security Today