"We will also be reviving our disciplinary complaint against Mr. Corbyn from September 2016 which the Labour Party has ignored until now".
Corbyn posted several times in the group after being tagged in posts, according to Collier's report.
Confronted yesterday, Mr Corbyn admitted being a member of the controversial group but denied ever seeing anti-Semitic posts.
The visit came after the Campaign Against Anti-Semitism published screenshots of messages apparently posted on the Palestine Live Facebook group.
Mr Corbyn confirmed he was signed up to the group without his knowledge but later exchanged messages on it.
And because the most active members of this Facebook group also tend to be the more anti-Semitic ones, their views set the tone for the group as a whole.
"I removed myself from the group in 2015". "Obviously, any antisemitic comment is wrong".
"Any anti-Semitism in any form is wrong".
The Palestine Live group was founded in 2013 and had a privacy setting that meant administrators could add people to the group without their agreeing to it.
The Labour MPs Clive Lewis and Chris Williamson were members of the group, as were two former Liberal Democrat politicians, Baroness Jenny Tonge and the former MP David Ward. "One of Mr. Corbyn's slogans is 'standing up, not standing by, ' but in this case he has not stood up but instead he actively joined in", said Joseph D. Glasman, head of Political and Government Investigations at Campaign Against Antisemitism.
Later responding to Mr Corbyn's speech Ms Slither said there was "no Left-wing case" for leaving the single market adding: "If we want to fund our radical manifestos to deliver governments for the many, not the few, we must support permanent United Kingdom membership of the European single market and the customs union".
"I don't think anyone is suggesting that anything that Jeremy has written in any Facebook group or anywhere else constitutes antisemitic comments", he said.
"As anyone knows, in social media all sorts of things are posted which often others participating aren't even aware of", the spokesperson, who was not named, was quoted as saying.
"It is repugnant if there are anti-Semitic posts - and I gather there are".
A spokeperson for Corbyn said: "Jeremy condemns anti-Semitism in all its forms in the strongest possible terms".
However, the reason why this particular Facebook group is in the news is because David Collier, an independent blogger who devotes his time to cataloguing the wilder excesses of the anti-Israel movement, spent several weeks researching and analysing what goes on in the group: and the anti-Semitism he found should worry everyone, whether they support Israel, Palestine, both or neither.
Scottish Tory chief whip Maurice Golden MSP said Labour's Brexit splits "are becoming deeper by the day".