Rishi Sunak was “appalled” by the way police treated a Jewish man during a pro-Palestinian demonstration in London, a Downing Street source has said. The Metropolitan Police were forced to issue a second apology for causing “further offence” after an initial apology about an officer’s use of the term “openly Jewish” sparked outrage. The police force found itself at the centre of a backlash when video footage circulated online of an officer talking to the Gideon Falter, chief executive of the Campaign Against Antisemitism, at a pro-Palestine march. In the video, the policeman said: “You are qui…