Jonathan Arkush, the outgoing President of the Board of Deputies, said British Jews were for the first time asking “do we have a future here?”, which he blamed on the Labour leader’s failure to stamp out anti-Semitism in his party.
Mr Arkush, one of two Jewish leaders who met Mr Corbyn to discuss the problem last month, said it was time for him to recognise “his real views about Israel”.
He also criticised the Archbishop of Canterbury for not providing a “stronger, clearer voice” in support of the Jewish community. Labour described his comments as “unfounded and outrageous”.
It comes as a Labour working group recommended measures to speed up the internal investigation of anti-Semitism allegations, with all cases anonymised to prevent any bias.
Mr Arkush, who became President of the Jewish Board of Deputies in 2015, the same year Mr Corbyn became the leader of the Labour Party, has never before directly accused him of anti-Semitism.