British Jews no longer feel safe bringing up their children in the United Kingdom and some are considering leaving the country, the former chief rabbi has claimed as pressure mounts on Jeremy Corbyn to act over accusations of antisemetism going unpunished in the Labour Party.
Although he avoided directly naming Jeremy Corbyn, it was clear who his remarks were aimed at.
"If you look at where they make their attacks, where they don't make their attacks: they will attack people who support the West and they will basically defend people who are anti-West", he continued.
"In a way, their attitudes to Israel got kind of caught up in that bigger and broader argument", he added.
Blair partially attributed Corbyn's antisemitism and anti-Zionism to his overall worldview.
"As long as we are seen as an anti-Semitic and racist party, ordinary people will not tolerate a party that is seeped in anti-Semitism".
Former prime minister Gordon Brown also insisted the IHRA definition must be adopted.
Former Prime Minister Gordon brown called on the opposition labour party to adopt the agreed worldwide definition of anti-Semitism.
Maajid Nawaz only yesterday delivered a damning explanation as to why he believes the Labour Party should now be considered institutionally racist.
Addressing the Jewish Labour Movement conference in north London, Mr Brown got a standing ovation for warning of growing antisemitism among the "conspiracy theorist" left as well as the "jack-booted" right.
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Shadow chancellor John McDonnell said he hoped the party's National Executive Committee would adopt all the examples.
In a letter to the party, he said that Corbyn's leadership was overseeing an "erosion of our core values".
Lord Sacks said Jewish people were thinking about leaving the United Kingdom because of the current atmosphere.
There had been a parliamentary meeting on the night before the vote, she said, which Labour were losing, but "Jeremy Corbyn didn't bother to come to the meeting".
Former chief rabbi Jonathan Sacks said Sunday the majority of Jews were questioning whether Britain was a safe place to bring up their children.
"Now this is very, very worrying and there is only one word for this, that is anti-Semitism", Sacks said, adding, "When people hear the kind of language that's been coming out of Labour, they can not but feel an existential threat".
A Labour activist who claimed criticism of antisemitism in the party was a "conspiracy" has been re-elected to its ruling body.
Sacks the BBC's Andrew Marr he knows of Jewish families that are already planning to leave Great Britain due to their fear that the Labour leader-should he become prime minister-would unleash a new wave of anti-Semitism.
Jewish Labour organisations said they would wait and see to what sort of clarification the NEC would sign up to, although there is frustration among many that antisemitism is being linked to what they argue is a separate foreign policy question about Israel and Palestine.
"I'm imagining that you would take issue with a police officer being a member of any political party?" You can lose trust in a moment.