Labour's deputy leader, Tom Watson, has stepped up his criticism of Jeremy Corbyn over antisemitism in the party by backing calls for automatic exclusion of members accused of anti-Jewish racism.
A total of eight former Labour officials spoke to Panorama, including four who have signed non-disclosure agreements (NDAs) on the subject of anti-Semitism, according to the BBC. A fuller extract of the email read: "If we're more than very occasionally using disciplinary action against Jewish members for anti-Semitism, something's going wrong, and we're muddling up political disputes with racism".
Meanwhile, former head of disputes, Sam Matthews, said he interpreted an email from Mr Milne as "not a helpful suggestion" but as "an instruction". "I think going forward we need to review where and how we're drawing the line", Milne wrote to Matthews and several others.
"Huge bravery shown by the young people who spoke out".
Labour has insisted the claims made in Wednesday's Panorama were inaccurate and the party is free of any and all allegations Jewish members are discriminated against and complaints are hushed up or ignored.
A Labour spokesman accused the broadcaster of "pre-determining" the outcome of its investigation.
But he told BBC Radio 4's Today programme it was up to Labour to make changes so party members "feel they can return with confidence".
But a party spokesman slammed the programme, saying it "engaged in deliberate and malicious representations created to mislead the public".
"Labour is taking decisive action against anti-Semitism, doubling the number of staff dedicated to dealing with complaints and cases". It alleged the former staffers who took part had "personal and political axes to grind".
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"This throws into doubt their credibility as sources".
A BBC spokesman said: "The programme adheres to the BBC's editorial guidelines".
"In line with those, the Labour Party has been given the opportunity to respond to the allegations".
Mr Watson said there needed to be a rule change to "auto-exclude" party members who have a "prima facie case to answer of using anti-Semitic behaviours and language". We stand in solidarity with Jewish people, and we're taking decisive action to root out antisemitism from our movement and society.
And shadow foreign secretary Emily Thornberry, speaking to Sky News before the Panorama programme was broadcast, refused to endorse the party's claim that the broadcast was a "political intervention" by the BBC.
Statements made by the former officials, said the BBC, included accusations that "the leader's office was "angry and obstructive" when it came to the issue; officials brought in by the party's general secretary, Jennie Formby, "overruled" some of their disciplinary decisions and "downgraded" punishments to a 'slap on the wrist;' and, Seumas Milne, one of Corbyn's closest aides, laughed when advised by a long-serving party official about what Corbyn should do to tackle anti-Semitism in the party".
Jewish MPs - particularly women - have been subjected to the most horrendous abuse and bad, violent threats, even being told they don't have human blood.
"The emails... are simply about ensuring the NCC is held accountable for the length of time they take to hear cases and about protecting the party against any successful legal challenge on the basis of perceived bias if the same panel is used in high profile cases".
Corbyn - who has himself been accused of anti-Semitism - is under investigation by the Equality and Human Rights Commission, the British government's watchdog on racism, for his handling of hate speech and hate crimes within the party.
It started with politicians dividing people with "us vs.them".