The number of incidents involving antisemitic vandalism recorded in the Netherlands last year increased by 40 percent, to a 10-year high of 28 cases.The increase in vandalism was part of a small overall rise in antisemitic incidents in 2017 over 2016, the Center for Information and Documentation on Israel, or CIDI, wrote in its annual incidents report, which the group published Saturday. CIDI recorded 113 incidents in 2017 compared to 109 in 2016.The data was published amid unprecedented developments in public debate on antisemitism in the Netherlands. This month, almost all of the political parties contending in the municipal elections in Amsterdam signed a document vowing tougher action against antisemitism.The move followed a Palestinian man’s smashing of windows in December of a kosher restaurant in Amsterdam. Holding a Palestinian flag, he then broke in and stole an Israeli one before being arrested.Last week, the rightist leader of the Party for Freedom, Geert Wilders, visited the restaurant. The Forum for Democracy party produced for the first time in the history of Dutch politics an ad campaign focused exclusively on antisemitism ahead of the March 21 municipal elections.Four incidents recorded by CIDI in 2017 involved physical violence against people.In one case, two Israelis were stabbed in an elevator on July 18 in a suburb of Amsterdam. A witness later testified that the assault was antisemitic. Two 18-year-old men were sentenced to prison for the assault. The victims were not in the Netherlands during the trial and therefore the witness’ testimony was not substantiated.Another incident, dated 26 June, involved a Jew of Syrian descent who was assaulted on Amsterdam’s Dam Square for wearing a Star of David pendant. He had been assaulted earlier this year at a fast-food eatery, where several men broke his arm, he said.In its recommendations, CIDI urged the judiciary to impose heavier sentences on offenders to increase deterrence. It also recommended the Dutch government and judiciary adopt the European Parliament’s definition of antisemitism. It features examples of demonization of Israel. In recent years, it was adopted by the United Kingdom and Romania, among other countries.