Labour accepted the "definition" (wrong-headedly in my view, but hey ho, your setup doesn't always have to do everything your way) a long time ago. The argument is over a single "example" which is clearly intended to stem free speech and criticism of the actions of the Israeli regime. There's an excellent letter in today's Guardian sent on behalf of all 13 members of the Joint List, the alliance of Arab parties in the Knesset, which praises Corbyn as a principled man who opposes racism and who aspires for peace and justice, and which rails against the "definition" which includes anti-Zionism as well as antisemitism and which the current bunch of dishonest dissenters are trying to use to unseat Corbyn.

And I put "definition" in quotes not because I'm doing an akenaton but because it is quite simply not a definition of antisemitism in any sense that fair-minded people would accept. And I don't care how many bloody countries or "decent democracies" have adopted it. Principle trumps all such considerations.