Green Party leader Polanski faces crisis over Zionism motion and party control

He has created a monster he either can't or won't control
A senior Green Party figure describes the fallout from the Zionism motion and Polanski's response to it.
Mark

So the Greens actually came second in this by-election. That's their best Westminster result ever. Why isn't that the story?

Mimi

Because the party conference voted to declare Zionism a form of racism just days before, and Polanski didn't vote on it. That's what everyone wants to know about.

Luke

Wait—he didn't vote because he was campaigning in the by-election? That's his explanation?

Mimi

Yes. He said he chose to focus on the campaign instead of being at the conference for the vote.

Mark

And he's Jewish himself, right? And banned from Israel?

Mimi

Both true. Which makes his silence on the motion even more complicated. He hasn't explicitly rejected what the party voted for.

Luke

What did he actually say when asked about it?

Mimi

He talked about genocide and displacement of Palestinians being racist, but he didn't say the motion itself was wrong. When asked about a two-state solution, he said it's not the party's role to decide.

Mark

So he's trying to thread a needle.

Luke

A needle that Caroline Lucas says he's failing to thread. She's the former leader, hugely respected in the movement, and she said publicly he failed to show leadership and she won't back him staying on.

Mimi

Right. And the party membership has tripled in a year—internal critics say it's attracting hard-left activists focused on the Middle East rather than environmental issues.

Mark

So he's lost control of the party he's supposed to be leading?

Luke

That's what one senior Green figure told the BBC: "He has created a monster he either can't or won't control." But we should be careful—that's one person's characterization, not a fact about what's actually happening inside the party.

Mimi

Fair. But the fact that Jewish organizations, European Green parties, and his own predecessor are all criticizing him publicly—that's not characterization. That's what happened.

  • The Green Party conference in Brighton passed a motion declaring Zionism an ethnonationalist ideology and backing a single Palestinian state encompassing all of historic Palestine — language that implicitly erases Israel.
  • Jewish organizations including the Board of Deputies and the Jewish Leadership Council condemned the vote, and sister Green parties across Europe added their voices to the criticism.
  • Caroline Lucas, the most iconic figure in British Green politics, publicly said Polanski had failed to show leadership and declined to endorse his continuation as party leader — a wound from within that cut far deeper than external pressure.
  • Polanski, who is Jewish and banned from Israel, refused interviews for days, then emerged after the by-election to say he could carry on — without rejecting the motion, instead framing Palestinian displacement as the real racism.
  • Internal critics warn that a surge in membership — more than tripling in a year — has brought hard-left activists whose primary focus is Middle East politics, with one senior Green describing the situation as 'a monster he either can't or won't control.'
  • A by-election result that would normally signal historic Green momentum was entirely eclipsed, leaving Polanski facing open insurrection from within and a widening gap between his conciliatory words and his party's increasingly polarizing direction.

In the early hours following a London by-election, Green Party leader Zack Polanski found himself at the center of a deepening identity crisis — not his own, but his party's. Days earlier, activists at the Brighton conference had voted to declare Zionism a form of racism, and Polanski, himself Jewish, had chosen neither to vote nor to clearly repudiate the motion. What might have been a moment of electoral momentum for the Greens became instead a reckoning with the question every political movement must eventually answer: what, and who, does it truly stand for?

Zack Polanski was standing outside a Camden council building in the predawn hours, waiting for a by-election result, when the cameras turned to him with questions that had nothing to do with the vote. The real story had already been written in Brighton.

At the Green Party's annual conference the previous weekend, activists had voted to declare Zionism a form of racism and to back the creation of a single democratic Palestinian state across all of historic Palestine — territory that includes modern-day Israel. Polanski, the party's leader, had not participated in the vote, saying he was campaigning in the by-election instead. In the days that followed, he declined repeated requests for interviews as pressure mounted from all sides.

The Greens did finish second in Holborn and St Pancras — their best-ever Westminster by-election performance — but that achievement was buried beneath the controversy. The Jewish Leadership Council and the Board of Deputies of British Jews condemned the conference motion. European Green parties weighed in. And then came the blow that seemed to sting most: Caroline Lucas, the former leader and defining figure of the British Green movement, told BBC Newsnight that Polanski had failed to show leadership, and stopped short of backing his continuation in the role.

When Polanski finally spoke after the by-election result, he said he could carry on as leader — but he did not reject the motion. He spoke instead of Palestinian displacement as 'clearly racist,' declined to state a position on a two-state solution, and promised that no one would be excluded from the party on the basis of faith. His critics inside the party were not reassured.

The membership had more than tripled in a year, and senior Greens told the BBC that the influx included hard-left campaigners more focused on Middle East politics than environmental policy. One described the situation plainly: 'He has created a monster he either can't or won't control.' The by-election night that should have marked a high point for Polanski's leadership had become, instead, the opening of a crisis with no clear resolution in sight.

The Green Party leader stood in the predawn darkness of Camden Council offices, waiting for by-election results that would normally command the night's attention. Instead, cameras and microphones turned toward Zack Polanski with questions that had almost nothing to do with whether his party could win a seat in north London. The real story had been written days earlier, at the party's conference in Brighton, where activists voted to declare Zionism a form of racism—and where Polanski, the party's leader, had chosen not to vote at all.

Sagal Abdi-Wali, the new MP for Holborn and St Pancras, arrived in Britain as a child refugee from Somalia in the 1990s, grew up in Camden, became a councillor four years ago, took the council leadership in May, and now holds the seat once represented by Keir Starmer. Her story is remarkable. But it was not her story that consumed the press pack that morning. Holborn and St Pancras has been Labour territory for decades—the political home of a former prime minister and a former cabinet minister before that. A Labour win here meant relief in Downing Street, not celebration. For the Greens, finishing second represented their best-ever performance in a Westminster by-election, a result that would normally signal momentum. Polanski had taken over the party leadership just over a year ago, and the Greens had ridden a political wave through local elections in London in May. But none of that mattered anymore.

What mattered was the motion passed at the Brighton conference the previous weekend. The party's activists had voted to declare Zionism an ideology supporting "an ethnonationalist Jewish state" and to back the establishment of "a single democratic Palestinian state in all of historic Palestine"—language that encompasses modern-day Israel. Polanski had not participated in the vote, saying he chose instead to campaign in the by-election. Since then, he had declined repeated requests for interviews as pressure mounted.

The response from outside the party was swift and severe. The Jewish Leadership Council and the Board of Deputies of British Jews issued criticism. Sister Green parties across Europe weighed in. But the blow that seemed to cut deepest came from within: Caroline Lucas, the former party leader and one of the most significant figures in the Green movement of her generation, told BBC Newsnight that Polanski had failed to show leadership on the issue. She stopped short of endorsing his continuation as party leader.

Polanski himself is Jewish and has been banned from Israel. When reporters asked him after the by-election result whether he could continue as leader, he said "of course I can carry on." But he did not explicitly reject the motion his party had passed. Instead, he spoke of "an ongoing genocide and the displacement of the Palestinian people," calling that "clearly racist." When asked if he believed in a two-state solution—an Israeli and Palestinian state coexisting peacefully—he said "I believe it is not our role to decide." He insisted his job was to "reassure people and make sure that we bring our party together" and that "no one will be excluded in the Green Party based on faith and religion."

Yet the numbers told a different story about who was joining the party. Membership had more than tripled in the past year, and internal critics said the influx included hard-left campaigners focused on Middle East politics rather than environmental concerns. One senior Green figure described the situation bluntly to the BBC: "He has created a monster he either can't or won't control." Many within the party were furious.

Polanski now faced the gravest crisis of his leadership. The by-election campaign was finished. The questions for him were just beginning. He confronted open insurrection from senior figures inside the party and criticism from organizations and figures far beyond it. The gap between what he was saying—that he wanted to hold the party together, that no one would be excluded—and what the party had voted to do, and what senior figures like Lucas were saying about his leadership, had become impossible to ignore. The morning's by-election result, which might have dominated the news cycle, had been entirely eclipsed by a crisis that showed no signs of resolution.

He has created a monster he either can't or won't control
— Senior Green Party figure, speaking to BBC
I believe that is clearly racist
— Zack Polanski, referring to the displacement of Palestinian people
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