Salomon Kijl was arrested in Amsterdam on 1 May 1933 for assault. The German community in Amsterdam met that day in Maison Boer on Eerste Weteringplantsoen in Amsterdam. After the meeting, about 34 of the participants were assaulted by a group consisting almost entirely of Jews, according to an Amsterdam police report. The evidence was very flimsy, however, and appeared to be based primarily on the arrest of Salomon Kijl. Most of the attackers were Communists who had headed for the Weteringschans after a meeting on the grounds of the Paleis voor Volksvlijt. In response to these events, the police spoke to leaders of the Jewish community. On 6 May 1933, a statement by chief rabbi A.S. Onderwijzer was read in all the synagogues of the NIG (Dutch-Jewish community), in which he strongly opposed these excesses.
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More information is available at the Stadsarchief Amsterdam (Amsterdam municipal archive), Access no. 5181, inv. no. 4743, no. 865.