London — British Prime Minister Keir Starmer was heckled Thursday during a visit to North London, a day after two Jewish men were wounded in a stabbing attack — the latest in a series of incidents that one of Starmer's cabinet members has called an antisemitism emergency.As he arrived in the Golders Green neighborhood, which has long been a hub of the British Jewish community, to meet members of the emergency services, loud booing could be heard and some residents shouted insults including "traitor" and "coward." A string of recent attacks, including arson targeting synagogues and other Jewish sites, has raised alarm...