McDonnell is a self-confessed Marxist.
Abbott stated that Mao did more good than harm (45 million civilian deaths in four years) and stated that a victory for the IRA would be a victory for everybody - a statement she still refuses to disavow.
Corbyn sees a moral equivalence between IRA murderers and the British peace-keeping soldiers in Northern Ireland.
The level of stupidity, twisted ideology &/or ignorance required to take these positions disqualifies them all from public office.