The original article at the Guardian is recommended. I can’t help missing important parts by only quoting excerpts.

John McDonnell: Starmer and co are trashing Labour’s legacy. We must take back control of our party – before it’s too late

The suspended Labour veteran John McDonnell has called for a grassroots leadership challenge to the Labour government, warning that unless party members, unions and MPs “stand up and assert themselves to take back control of our party”, Labour risks losing not just its power: “We could lose a party.”

The former shadow chancellor accused Keir Starmer’s government of “callousness and political incompetence”, criticising its hesitance in abolishing the two-child limit on benefits, and what he calls a “brutal launch of an attack on benefits of disabled people”.

Writing for the Guardian five decades after joining Labour as a young trade unionist, McDonnell said the movement he had devoted his life to had “instigated a series of policies that fly like a knife to the heart of what we believed the Labour party above all else stood for when we joined the party”.

…

“Unless the party members, our affiliated unions and members of the parliamentary Labour party stand up and assert themselves to take back control of our party, in the next period, in the Labour party’s history we may not just lose a government, we could lose a party”, he said.

The original article at the Guardian is recommended. I can’t help missing important parts by only quoting excerpts.