In a recent CNN podcast appearance, terrorism expert Professor Jessica Stern offered critical insights into ISIS’s enduring influence following the Bondi Beach attacks in Australia, highlighting the organization’s sophisticated digital recruitment strategies and its appeal to vulnerable individuals in Western nations.

Speaking on Fareed Zakaria’s Global Public Square (GPS) program on December 21, 2025, Stern explained that ISIS has maintained its global reach despite significant military defeats in recent years, largely through what she termed its “digital caliphate.”

“ISIS was damaged severely with the attack in 2019 when the caliphate was defeated, but it persists, and it persists largely through its digital caliphate, which is very effective,” Stern told Zakaria. She emphasized that the organization’s propaganda apparatus significantly outmatches that of its predecessor, Al-Qaeda, particularly in targeting Western audiences.

The Boston University research professor, who has spent over two decades studying terrorism, pointed to fundamental differences in the two groups’ approaches. “It wanted to establish the caliphate immediately, whereas Al-Qaeda had a longer-term agenda,” she explained. “But the main reason it’s much more effective at radicalizing people in the West is how sophisticated it is through its digital appeal.”

The Bondi Beach attacks, which have sent shockwaves through Australia’s security establishment, represent just the latest example of ISIS’s continued ability to inspire violence globally, even without direct operational control. Australian authorities have been investigating possible digital connections between the perpetrators and ISIS propaganda channels.

Stern’s research into the psychological profiles of terrorist recruits reveals a complex pattern of motivation that extends beyond purely ideological factors. Based on extensive interviews with former terrorists, particularly Western lone actors, she noted that “personal grievances, their emotional distress was at least as important as the ideals that a terrorist group claims to be promoting.”

While careful to avoid stigmatizing mental health issues, Stern observed that individuals with certain psychological vulnerabilities appear disproportionately susceptible to extremist messaging. “The vast majority of people who are mentally ill or suicidal or deeply distressed, of course, do not become terrorists. But those people are quite overrepresented in our data,” she said.

Perhaps most concerning in Stern’s assessment was her warning about diminished counter-terrorism capacity within Western governments. “Our government is largely hollowed out,” she cautioned. “We had a large number of people who are very sophisticated in their understanding of Western recruits to terrorist organizations. And many of them have left, and some are now working on other things.”

This brain drain has reportedly occurred as security agencies have redirected resources toward immigration and migration concerns, potentially leaving gaps in monitoring online radicalization. “I don’t think we’re ready for this,” Stern warned, suggesting current capabilities may be insufficient to counter ISIS’s digital recruitment efforts.

The timing of Stern’s analysis coincides with growing concern among security experts about a potential resurgence in ISIS-inspired attacks across Western nations. The Australian incident has prompted several countries, including the United States and United Kingdom, to review their counter-terrorism protocols, particularly regarding online radicalization.

Stern brings considerable authority to this analysis as a globally recognized expert on perpetrator psychology and terrorism. Currently a research professor at Boston University’s Pardee School of Global Studies and a 2024-2025 Harry Frank Guggenheim Distinguished Scholar, she has taught counter-terrorism at Boston University, Harvard, and CIA University. Her expertise is further demonstrated through her authorship of several influential books, including “My War Criminal: Personal Encounters with an Architect of Genocide,” “Denial: A Memoir of Terror,” and “The Ultimate Terrorists.”

The full interview can be accessed through CNN’s Global Public Square podcast platform.