Could be a revenge attack for New Zealand. Apparently Dutch police recently stopped a nail bomb attack in Rotterdam and two Moroccan men planning to attack tourists in Amsterdam. Been to Holland many times always found the Dutch people friendly and accomodating, love the place. Thoughts go out to the victims, again just normal folk like us going to work. Awful.
Just goes to show that you are not safe anywhere these days. Who could have predicted an atrocity like New Zealand for example? Just so unexpected and yet more evidence that there is nowhere in the world that is safe from those with extremist views, whichever side they are working for.