Europe faces renewed Islamist terror threat as arrests mount

Europe is confronting a persistent Islamist terrorism threat as arrests, convictions and intelligence warnings pile up across several countries, with Spain emerging as one of the continent’s biggest counterterrorism hotspots.

Spain recorded 117 arrests for jihadist terrorism-related offences in 2025, the highest figure among European Union countries, according to a July Europol report. The issue has gained renewed attention following the extraordinary arrival of tens of thousands of Moroccan migrants in Spain’s North African enclave of Ceuta last month.

Spanish media reported that around a dozen people among those arriving had previously been deported from Spain over suspected terrorism-related concerns. However, Spain’s Interior Ministry has not confirmed those reports, saying there was no evidence that the arrivals posed a threat to public security.

The Ceuta episode nevertheless highlights the continuing security challenge facing European authorities as they attempt to monitor radicalisation while managing large-scale migration.

Terror arrests across Europe

The concern extends well beyond Spain. Germany’s domestic intelligence assessment estimates that around 28,000 people are part of the country’s Islamist scene, including approximately 9,110 considered oriented towards violence.

Germany has also faced questions over how a young man previously convicted of supporting Islamic State was released before an alleged attack at Berlin’s Pride event last month, in which one woman was killed and almost 30 people were injured.

Austria, Sweden and Britain have likewise reported arrests involving alleged supporters of Islamic State or other Islamist extremist activity.

In Britain, authorities recorded several terrorism convictions during July, while the government says Islamist terrorism remains the country’s primary domestic security threat, accounting for roughly three-quarters of Security Service counterterrorism casework.

Europe has learned — but the threat remains

Counterterrorism specialists say European security services have become considerably better at identifying and disrupting Islamist networks since the wave of Islamic State attacks and radicalisation that shook the continent over the past decade.

But the threat has not disappeared.

Experts point to online radicalisation, extremist propaganda, foreign funding and ideological networks as continuing problems, while authorities also face the difficult task of distinguishing genuine terrorist threats from individuals suffering from other forms of instability.

The result is a familiar European dilemma: security agencies are becoming more effective at detecting potential extremists, yet the number of investigations and arrests demonstrates that Islamist radicalisation remains a significant problem.

The latest arrests across Europe suggest that, despite years of counterterrorism operations, the continent has not yet solved the problem of Islamist extremism.

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What a mess.

Often brainwashed in Salafi mosques funded by Saudi Arabia....