The Parliamentary Labour Party meeting on Monday was "like a lynch mob without the rope", the shadow chancellor has said.
John McDonnell has stuck by Jeremy Corbyn since he lost a confidence vote among MPs by 172 to 40 but refused to resign, insisting he still has a "people's mandate" to lead following his landslide victory in the Labour leadership elections last summer.
Jeremy Corbyn has been my closest friend over the last 35 years in politics. I support him 100%.
Mr McDonnell branded the actions of Labour MPs who wanted Mr Corbyn to stand down as leader as "just bizarre" and "not acceptable", arguing that rather than infighting the party should be looking after the interests of the country as the Government "fell apart".
The MP for Hayes and Harlington added that had Mr Corbyn "walked on water" during the EU referendum, he would still have been blamed for remain's loss at the polls.
A defiant Mr McDonnell added that since Mr Corbyn won the leadership election they had been expecting a "coup".
The leader of the UK's biggest trade union has said the country is 'riven' as a result of the EU referendum.
Len McCluskey told ITV News that the trade unions can help broker a peace deal and reunite the party now the "coup has failed".
Labour leader Jeremy Corbyn said he would 'reach out' to MPs that oppose his leadership but said they should 'respect democracy'.