Does the Green Party have an antisemitism problem?

Zack Polanski has reason to be pleased with his ­leadership of the Green Party so far.

Membership has ­tripled since he took over last September, and the party has made “great electoral strides”, said The Times. It is polling strongly and is forecast to “make gains in Labour’s London strongholds” in today’s local elections.

But “there is a darker side”. Polanski, himself Jewish, “appears intent on exploiting” anger on the left over Israel’s bombardment of Gaza. As he works to cultivate a new...