There was the Utrecht tram attack last winter, though it was small-scale. And authorities said last year that people arrested in Arnhem were planning a major terrorist attack. So perhaps there's some justification for the official caution, despite the absence of a major incident so far.
ETA: To clarify, I'm not saying that people shouldn't travel to the Netherlands (I still will), just that the warning may have some basis.
Last edited by Giggleswick; Jul 21, 2019 at 10:30 am