Jeremy Corbyn did not invent this form of politics, but he has had a lifetime within it, and now personifies its problems and dangers. He issues empty statements about opposing antisemitism, but does nothing to understand or address it. We conclude that he cannot seriously contemplate antisemitism, because he is so ideologically fixed within a far left worldview that is instinctively hostile to mainstream Jewish communities.

Today, leaders of British Jewry tell Jeremy Corbyn that enough is enough. We have had enough of hearing that Jeremy Corbyn “opposes antisemitism”, whilst the mainstream majority of British Jews, and their concerns, are ignored by him and those he leads. There is a repeated institutional failure to properly address Jewish concerns and to tackle antisemitism, with the Chakrabarti Report being the most glaring example of this.

When Jews complain about an obviously antisemitic mural in Tower Hamlets, Corbyn of course supports the artist. Hizbollah commits terrorist atrocities against Jews, but Corbyn calls them his friends and attends pro-Hizbollah rallies in London. Exactly the same goes for Hamas. Raed Salah says Jews kill Christian children to drink their blood. Corbyn opposes his extradition and invites him for tea at the House of Commons. These are not the only cases. He is repeatedly found alongside people with blatantly antisemitic views, but claims never to hear or read them.

Again and again, Jeremy Corbyn has sided with antisemites rather than Jews. At best, this derives from the far left’s obsessive hatred of Zionism, Zionists and Israel. At worst, it suggests a conspiratorial worldview in which mainstream Jewish communities are believed to be a hostile entity, a class enemy. When Jeremy Corbyn was elected leader of the Labour Party, Jews expressed sincere and profound fears as to how such politics would impact upon their wellbeing. Our concerns were never taken seriously. Three years on, the Party and British Jews are reaping the consequences.

Routine statements against antisemitism “and all forms of racism” get nowhere near dealing with the problem, because what distinguishes antisemitism from other forms of racism is the power that Jews are alleged to hold, and how they are charged with conspiring together against what is good. This is not only historic, or about what Jeremy Corbyn did before being Party leader. It is also utterly contemporary. There is literally not a single day in which Labour Party spaces, either online or in meetings, do not repeat the same fundamental antisemitic slanders against Jews. We are told that our concerns are faked, and done at the command of Israel and/or Zionism (whatever that means); that antisemitism is merely “criticism of Israel”; that we call any and all criticism of Israel “antisemitic”; that the Rothschilds run the world; that ISIS terrorism is a fake front for Israel; that Zionists are the new Nazis; and that Zionists collaborate with Nazis.

Rightly or wrongly, those who push this offensive material regard Jeremy Corbyn as their figurehead. They display an obsessive hatred of Israel alongside conspiracy theories and fake news. These repeated actions do serous harm to British Jews and to the British Labour Party.

Jeremy Corbyn is the only person with the standing to demand that all of this stops. Enough is enough.

Board of Deputies of British Jews, Jewish Leadership Council