The leaders of the Jewish communities of four Nordic countries said that a bill proposing to ban nonmedical circumcision in Iceland “will guarantee” that no Jewish community is established there. The presidents of the umbrella groups of Jewish communities in Sweden, Denmark, Norway and Finland issued the unusual warning Tuesday in an open letter to all Icelandic lawmakers in reaction to the submission last month of a bill proposing to ban all nonmedical circumcision of boys younger than 18 in Iceland, a Scandinavian island nation of some 300,000 people with a few hundred Jews and Muslims. Lawmakers from four parties...