There have been some shocking cases of personal abuse. Bullying must not be allowed to triumph.
His refusal to get to grips with Labour anti-Semitism, or think about anything he finds personally disagreeable, makes him hopelessly unprofessional.
Will they keep their heads down as their colleagues are picked off by the hard left?
An apology is in order to car park attendants. They could think up better questions than the Labour leader.