The claim that every antisemitic Far Left deviant in Britain has signed up to Jeremy Corbyn's new party and that their entire voter base will be 700,000 is unsubstantiated and inaccurate.
Every antisemitic Far Left deviant in Britain has signed up to Corbyn's new party to make a point. 700,000 will be their entire voter base.

Gary Lineker and Jeremy Corbyn join Mo Salah in condemnation of Uefa tribute to ‘Palestinian Pele’ - The Independent
Source: independent.co.uk
Key Evidence
No credible data or sources confirm that all antisemitic Far Left individuals in Britain have joined Corbyn's new party.
The number "700,000" as a voter base is unverified and unsupported by official records.
Provided sources do not corroborate any part of this claim.
What the Evidence Shows
This statement makes sweeping generalizations and unverified assertions about political affiliations and voter bases.
The claim that "every antisemitic Far Left deviant in Britain" has joined Corbyn's new party is an extreme generalization without evidence. Political affiliations are diverse and complex, and no credible data supports such a categorical statement.
The figure of "700,000" as the entire voter base for Corbyn's new party lacks any publicly available verification or official membership/voter registration data. Political parties' voter bases fluctuate and are influenced by many factors.
The sources provided do not support or mention this claim. One source discusses the political space on the left involving Corbyn and the Greens,youtube.comyoutube.comIs There Space On The Left For Corbyn AND The Greens? while the other relates to condemnation of a UEFA tribute involving Corbyn but does not address party membership or antisemitism claims.
independent.co.ukindependent.co.ukGary Lineker and Jeremy Corbyn join Mo Salah in condemnation of Uefa tribute to...
Accusations linking antisemitism broadly to a political faction or party require careful, evidence-based analysis due to their serious nature. Such claims should not be made without credible proof.
In summary, this statement is a politically charged opinion presented as fact but lacks credible evidence or support from reliable sources.