European Green party says motion goes against its policy, with German Green co-leader calling it ‘intolerable and unacceptable’

• Zack Polanski may rue lack of leadership when Greens needed him to act

The English and Welsh Greens are facing international ostracism after adopting a policy declaring Zionism as a form of racism, which has drawn dismay from the group representing European Greens.

The co-leader of the German Greens separately said the policy was “intolerable and unacceptable”, running contrary to its belief in the right of Israel to exist.