Labour delegates have gone to some effort to make sure that conference is a hostile environment for Jews - those Jews, anyway, who refuse to disavow their relationship to the global Jewish community, half of which lives in Israel.
The Party leadership is complicit. We've seen it all before, especially in the University and College Union, which turned out to be a prototype of the Labour movement more generally.
The wider membership, which has the power to put a stop to it, is also complicit; it doesn't know, it doesn't understand, it doesn't care, it doesn't act, it allows.
This isn't just a weird eccentricity of an otherwise good party but a phenomenon of the Party as a whole and of the left as a whole; antisemitism doesn't taint every individual, but there is a institutional, cultural and political antisemitism throughout the British left.
Antisemitism is symptomatic of deeply anti-democratic ways of thinking and of widely held conspiracy fantasies by which the world is understood.
The EU flag is prohibited by Labour image-makers while the Palestinian flag colours the hall. The symbol of European unity and co-operation is banned and the symbol of Jewish self-determination is absent and disgraced.
People expelled from the Party for antisemitism are feted around the fringe and supported as victims of a witch-hunt. Leaders of the movement show that they believe talk of antisemitism to be nothing but a conspiracy against them by their enemies, to standing ovations.
What has become known as the "Middle East Debate" has become, in this context, nothing more than an opportunity to bait those Jews who still endure this antisemitic space - and for delegates to thrill to their own antisemitic courage.
Where is the Russia debate or the Syria debate, where are the Kurdish flags, where is the Yazidi solidarity movement, where is concern for Congo or for Yemen or for the Iranian opposition or for gay people in Chechnya or for those being rounded up by the Chinese state?
At the vanguard of the antisemitic environment are antizionist Jews who educate people to believe that the Jewish community is split, that Israelis are Nazis, that Israel is a unique evil on the planet & that there is no danger of the creation of an antisemitic movement.
Thousands of people on the left are being educated that the Jews are the enemy of the left and that the Jews stand between "us" and socialism.
However the Corbyn movement turns out, this key idea, that there is a bourgeois and imperialist Jewish conspiracy, will endure.