Unite boss defended the Labour leader at party conference.
But the trade union boss said focus must be on forcing a general election.
I left Labour last year over anti-Semitism, and now I am without a trade union to protect my rights as a faith worker
Oliver Coppard ran against Nick Clegg in 2015.
The sight of McCluskey, the most powerful man in the Labour Party, telling off the leadership of the Jewish community is just disgraceful
'Unfair and unwarranted.'
Corbyn Has Answered Anti-Semitism Concerns, But Jewish Community Leaders Won't Take 'Yes' For An Answer
What is the response from the leading Jewish community organisations to Corbyn's record of reaching out, of understanding, and of action? Intransigent hostility and an utter refusal to engage
Exclusive: Unite general secretary warns against McCarthyism.
Unite general secretary speaking at Labour's music festival in north London.
Union chief's team say he was unaware of the social media post