On 5th April 2016, it was reported that then-Labour leader Jeremy Corbyn had been asked to comment on his brother’s assertions in .
On 13th November 2016, it was reported that Mr Corbyn had appeared at an event hosted by the Keep Talking group, alongside a Holocaust denier and a 9/11 conspiracy theorist.
On 21st January 2017, Campaign Against Antisemitism reported on Mr Corbyn’s retweet in .
On 24th September 2017, it was reported that the Labour Party had refused Mr Corbyn’s application for membership (having previously resigned from the Party in 2002), although the reason is not given.
On 23rd October 2018, it was reported that the Jewish writer Lee Kern had drawn attention to Mr Corbyn’s tweet in  and another in which Mr Corbyn had inveighed against politicians attending an anti-Brexit march, which he characterised as a “Goldman Sachs-Super Rich-Wall-Street-EU-4th Reich” rally, calling on the Labour Party to respond and requesting that Jeremy Corbyn condemn “the antisemitic rhetoric of his brother”.
On 12th May 2020, Mr Corbyn appeared on the Richie Allen show alongside the notorious antisemite Gilad Atzmon, who has denounced what he calls “the Holocaust religion”; has suggested that burning down a synagogue might be a “rational act”; and has suggested that the Grenfell fire was the work of ‘Jerusalemites’. His claim that Campaign Against Antisemitism fabricated cases of antisemitism for financial gain led to his being successfully sued for libel. The notion of supposed “Jewish power” is a recurrent theme in his writing.
Richie Allen is a video blogger whose show purports to discuss “…that which the mainstream media won’t”. It is broadcast on his own website and is also available elsewhere, including on Davidicke.com, the site of writer and conspiracy theorist David Icke, who has also appeared on Mr Allen’s show. The show has hosted Gilad Atzmon on numerous occasions.
On 21st October 2020, it was reported that an anti-vaxxing social media forum associated with Mr Corbyn was one of those discovered to harbour antisemitic conspiracy theories.
On 1st February 2021, it was reported that the police were being called upon to investigate Mr Corbyn over anti-vaccination leaflets for which he shared responsibility. The pamphlets diminished the nature of the Holocaust, showing an image of the Auschwitz-Birkenau concentration camp festooned with needle imagery; the infamous gates had been adapted so that the sign read “Vaccines are safe path to freedom” instead of “Arbeit macht frei” (“work sets you free”). The pamphlet had reportedly been delivered to a number of Jewish homes, where they had caused “upset and concern.”
On 4th February 2021, it was reported that Mr Corbyn had been arrested on suspicion of “malicious communication and public nuisance”. However, he described accusations of antisemitism as “completely absurd”, citing his 22-year-long marriage to “a Jewess”, and going on to say: “I’ve also employed Jewish people in my business Weather Action, one of whom was a superb worker.”
In May 2021, Campaign Against Antisemitism put this matter to Mr Corbyn, but did not receive a response. Given Mr Corbyn’s position within the Party, any disciplinary action being taken against him seems unlikely.