Journalists with “egregious” views such as celebrating the Holocaust were allowed on BBC Arabic, the broadcaster’s head of news has admitted. Jonathan Munro, the BBC’s interim chief executive of news and current affairs, told MPs that the corporation had brought in new rules to beef up the vetting of contributors and their comments on social media. But he admitted that Samer Elzaenen, who was exposed by this newspaper last year for having called for Jews to be burned “as Hitler did”, had slipped through the net. The Telegraph can reveal that as recently as last month, BBC Arabic featured a...