Well, the State Dept is anything but vague about its argument:
https://www.state.gov/releases/office-of-the-spokesperson/20...
"The A/I Collective exclusively offers its tools and services to radical left-wing actors and manually vets all potential users for ideological affinity before granting them access to its infrastructure. The group has become a key node in a transnational campaign by violent and criminal far-left networks to destabilize the United States and its partners across Europe, the Western Hemisphere, and beyond...."
"The anarchist cells responsible for sabotaging rail systems across France, Italy, Germany, and the Netherlands in 2026, relied on A/I Collective tools and services to claim responsibility for the attacks, publish official communiqués, and disseminate manuals for constructing improvised incendiary devices to target railways and other critical infrastructure.
The anarchist cell responsible for sabotaging the Transalpine Pipeline (TAL) in March 2026, which temporarily halted crude oil flows to Austria, Germany, and the Czech Republic, relied on A/I Collective tools and services to claim responsibility for the attack and publish official communiqués, as well as to disseminate a manifesto calling for additional attacks on critical infrastructure and referring adherents to another A/I Collective platform, which provides detailed sabotage manuals as well as maps of vulnerable critical infrastructure across North America.
The far-left extremist network responsible for multiple arson attacks and acts of sabotage against Germany’s rail and energy infrastructure between 2011 and 2026, including a January 2026 attack on Berlin’s power grid that cut power to 45,000 households and resulted in a fatality, relied on A/I Collective tools and services to claim responsibility for attacks, publish official communiques, and disseminate a manifesto calling for additional attacks on energy infrastructure worldwide."