• National security and terrorism
  • Radicalisering ontrafeld
  • Te vuur en te zwaard

What’s going on in the jihadist movement?

Over the last couple of years I (and many fellow terrorism researchers with me) have been spending more and more time on studying right-wing extremism. But that does not mean that jihadist terrorism is no longer a problem. In a recent installment in the GTACC Speakers Series I gave an overview of the current state […]

Read More

Updates on the site

Recently I updated the site with some of the things I did in 2020. There was some publicity around my second book (notably an interview in the Dutch daily NRC), and I began to engage in the research and analysis of conspiracy theories and right-wing extremism. In the summer I joined the Verwey-Jonker Institute as […]

Read More

New book chapter out, another one on the way

Leuven University Press recently published the edited volume Militant jihadism: today and tomorrow. I added a chapter in which I’m making a projection about the modus operandi of jihadist terrorists in Europe in the coming years. Be sure to check it out, as well as the other contributions. It’s a really interesting collection and it’s […]

Read More

Issue Brief on the knife attack at Amsterdam Central Station

Over the last months I have been compiling a database about jihadist terrorist attacks in Europe, Canada and the US from 2004 to the present. This database can contribute to terrorist threat assessments by identifying trends and patterns in the way jihadist terrorists commit attacks. More specifically, it can provide fact-based analyses that can help […]

Read More

Research report on jihadist modus operandi

In cooperation with the International Centre for Counter-Terrorism in The Hague I published a new research report on jihadist modus operandi. We often associate jihadist terrorism with suicide attacks, but in this report I try to demonstrate that most jihadist attacks in recent years in the West were not suicide attacks. Over the period 2004-2017 […]

Read More

The terrorist attacks in Catalonia

On 17 August Spain was struck by the most deadly terrorist attacks since the 2004 Madrid Bombings. I updated this site with some newspaper and radio interviews (in Dutch) and an article (in English) about these terrible atacks. You can find the interviews in the ‘media appearances’ section, and the article in the ‘commentary and […]

Read More

Gunstige recensies over ‘Radicalisering ontrafeld’

‘Radicalisering ontrafeld’ heeft gunstige kritieken gekregen in Trouw en in de Vlaamse krant Het Belang van Limburg. Trouw heeft het over een “inzichtelijk” en “helder en leerzaam boek” en wijst op de “kennis van zaken” en “soepele pen” van de auteur. Marcel Grauls heeft namens Het Belang van Limburg mijn boek besproken in een wekelijkse rubriek […]

Read More

‘Radicalisering ontrafeld’ is uit!

Mijn eerste boek, ‘Radicalisering ontrafeld: tien redenen om een terroristische aanslag te plegen’ ligt nu in de winkel! Afgelopen vrijdag heb ik het boek gepresenteerd in boekhandel Donner in Rotterdam, en de afgelopen dagen heb ik met BNR, Omroep Max en de NRC over het boek gesproken. Ik ben blij met elke lezer, dus ik nodig […]

Read More

Boekpresentatie ‘Radicalisering ontrafeld’ bij Donner

Op 17 maart komt mijn nieuwe boek ‘Radicalisering ontrafeld’ uit. Ter gelegenheid van de publicatie zal ik op 17 maart bij Boekhandel Donner in Rotterdam een lezing geven over de huidige terroristische dreiging en de manier waarop we deze bestrijden. Ik zal onder meer ingaan op de daders van recente aanslagen, de strijd tegen de […]

Read More