Zack Polanski is furious. Not so much with the stabbing of two Jews in Golders Green yesterday. So far, he has managed one perfunctory tweet about that horrific attack, which curiously doesn’t feature the words Jews or anti-Semitism. Since then, he and his outriders have been angrily pushing back on any suggestion that, when it comes to the rise in Jew hatred, his Green party might just have something to do with it.