Europe’s security landscape is undergoing a profound transformation. While military conflicts continue in the Middle East, European intelligence agencies are increasingly focused on a different type of threat—hybrid warfare. Rather than conventional military operations, this strategy combines cyber activities, proxy networks, disinformation, espionage, intimidation, and the recruitment of local actors to create instability while allowing the sponsoring state to deny direct responsibility.
Following the outbreak of the 2026 Iran war, a series of anti-Semitic attacks across several European countries has prompted investigators to examine whether Tehran or Iranian-linked networks are attempting to export regional tensions onto European soil. Although investigations remain ongoing and definitive legal conclusions have not been reached, security experts across Europe increasingly describe the pattern as consistent with modern hybrid warfare tactics.
What Is Hybrid Warfare?
Unlike conventional warfare, hybrid warfare seeks to weaken an opponent without launching a full-scale military invasion.
It typically combines:
- Cyber operations
- Intelligence activities
- Proxy organizations
- Criminal networks
- Online radicalization
- Disinformation campaigns
- Economic pressure
- Psychological operations
The objective is not necessarily to defeat an enemy militarily but to generate fear, political division, and social instability while maintaining plausible deniability.
Western intelligence agencies have previously accused both Russia and Iran of employing elements of this strategy in different regions.
Why Are European Authorities Looking Toward Iran?
Since the escalation of the Iran conflict in early 2026, several attacks targeting Jewish institutions, synagogues, charities, and Israeli-linked organizations have occurred in countries including the United Kingdom, Belgium, France, and the Netherlands.
Investigators say many incidents share several unusual characteristics:
- Small-scale attacks rather than mass-casualty terrorism.
- Young recruits allegedly hired online.
- Criminal intermediaries instead of ideological militants.
- Anonymous online groups claiming responsibility.
- Targets chosen primarily for symbolic value.
Security analysts believe these characteristics resemble hybrid warfare more than traditional terrorism. However, authorities continue to investigate individual cases, and direct state responsibility has not been conclusively established in court.
The Mystery Surrounding HAYI
Much attention has focused on a relatively unknown organization called Harakat Ashab al-Yamin al-Islamia (HAYI).
The group suddenly appeared online shortly after the regional conflict intensified and rapidly claimed responsibility for numerous attacks against Jewish targets across Europe.
Several intelligence analysts suspect the organization could function as a front or proxy structure designed to obscure the identities of those directing the operations. European authorities are investigating these allegations, while Iran has denied involvement.
Recruiting Local Criminals Instead of Terror Cells
One of the most significant changes observed by investigators is the apparent reliance on local criminals rather than established terrorist organizations.
Reports indicate that some suspects were allegedly recruited through encrypted messaging applications and social media platforms, offered relatively small financial payments to carry out arson, vandalism, or surveillance. Some reportedly claimed they did not fully understand the political significance of the targets they were asked to attack.
This outsourcing model reduces operational risk for those allegedly directing the campaign while complicating law enforcement investigations.
Europe Faces a New Internal Security Test
European governments now face a difficult balancing act.
Authorities must protect vulnerable communities while preventing foreign geopolitical conflicts from inflaming domestic tensions.
Countries have responded by:
- Increasing police protection around Jewish institutions.
- Expanding counter-intelligence investigations.
- Strengthening monitoring of foreign influence operations.
- Enhancing intelligence cooperation among European partners.
Security agencies also warn that hybrid threats extend beyond physical attacks to include cyber operations, online propaganda, and foreign influence campaigns aimed at exploiting social divisions.
Why Plausible Deniability Matters
One defining feature of hybrid warfare is plausible deniability.
If attacks are carried out by loosely connected individuals, criminal gangs, or newly created organizations, attributing responsibility to a foreign government becomes legally and diplomatically challenging.
This ambiguity allows the alleged sponsor to deny involvement while still potentially achieving strategic objectives such as increasing fear, stretching security resources, and creating political polarization.
This tactic has become an increasing concern for European intelligence services, regardless of the specific actor involved.
Europe’s Intelligence Response Is Evolving
The recent incidents have accelerated discussions across Europe about adapting national security frameworks to confront state-sponsored hybrid threats.
Counter-terrorism agencies are placing greater emphasis on:
- Tracking foreign proxy recruitment.
- Monitoring encrypted online communications.
- Countering hostile influence operations.
- Sharing intelligence across EU and NATO partners.
- Protecting communities vulnerable to politically motivated violence.
Officials increasingly argue that future security threats may originate less from conventional terrorist organizations and more from decentralized networks supported by hostile foreign actors.
Evidence, Risks, and Remaining Questions
While the pattern of attacks has heightened concerns, it is important to distinguish between intelligence assessments and judicial findings. Multiple European investigations are exploring potential Iranian links, but many cases remain unresolved, and officials continue to emphasize that evidence must meet legal standards before responsibility can be definitively assigned.
What is already clear, however, is that Europe is preparing for a security environment where geopolitical conflicts increasingly spill across borders through covert influence, proxy actors, and low-cost disruptive operations rather than traditional military confrontation.
Europe’s defining security tests
Whether or not every recent anti-Semitic attack can ultimately be traced to Iranian direction, the broader lesson for Europe is unmistakable: hybrid warfare has become a central security challenge of the 21st century. The combination of online recruitment, criminal intermediaries, proxy organizations, and psychological impact presents a complex threat that conventional counter-terrorism alone may not fully address.
As investigations continue, European policymakers are likely to strengthen intelligence cooperation, tighten counter-espionage measures, and invest more heavily in resilience against foreign influence campaigns. The battle against hybrid warfare may prove to be one of Europe’s defining security tests in the years ahead.
