There has been an increase in Jews attending a Passover seder, eating matzot and having bar- or bat-mitzva celebrations. On the other hand, only 5% of Dutch Jews follow the kosher dietary laws.
He adds: “The number of those in the Netherlands who are Jewish according to Jewish law (halachically Jewish) is about 37,000. This population maintains its numbers in part because of the increasing number of Israelis living in the Netherlands, which currently stands at about 9,000. Their stay is often temporary, however, as many of them are or ex-pats who have found work in the Netherlands. Jews who have only Jewish fathers or grandfathers, are not considered to be Jewish according to Jewish law.