It is the secret investigation of a Liverpool constituency Labour group that was never published. A devastating report on bullying — or “uncomradely behaviour” — reveals why the party in this former Militant-run city is in the grip of its worst infighting in 30 years.

Written by senior party staff, it states that a female Jewish MP was “physically threatened”, called a “JLM [Jewish Labour Movement] bitch” and made to endure “obsessive interrogations” about Israel-Palestine at every meeting. It found members “feared for their own or others’ physical safety”. Activists entered meetings “without proof of membership”, hounded longstanding members, and accused Israel of being responsible for Isis, Hamas and al-Qaeda.

“Incidents of anti-semitism seem to have occurred with troubling regularity,” the report, approved by Labour’s