Faithlilly - Answering your question on the appropriate thread. You provided the names of 200 British Jews who had signed a letter in support of Corbyn. My contention is that they were in a minority, and here is support for that contention:
British Jews
In 2017, a poll commissioned by Campaign Against [ censored word]emitism of 1,864 British Jewish adults[391] found that 83% (in 2016, 87%) felt that the Labour Party was too tolerant of [ censored word]emitism among its MPs, members, or supporters.[392]
A Survation poll by The Jewish Chronicle prior to the 2017 general election found that 13% of Jews intended to vote for Labour, an increase from the 8.5% in May 2016. When asked to rank the degree of "[ censored word]emitism among the political party's members and elected representatives" between 1 (low) to 5 (high), Jews ranked Labour at 3.94, compared with 3.64 for UKIP, 2.7 for the Liberal Democrats, and 1.96 for the Conservatives.[393][non-primary source needed]
In September 2018, a Survation survey conducted for The Jewish Chronicle found that 85.9% of British Jews considered Jeremy Corbyn [ censored word]emitic, and 85.6% considered the Labour Party to have "high" or "very high" levels of [ censored word]emitism within the party's members and elected representatives. This compares to 1.7% and 6.1% for Theresa May and the Conservative Party respectively. This was an increase from 69% who considered the party to have "high" or "very high" levels of [ censored word]emitism in 2017.[394][non-primary source needed]
A poll conducted for The Jewish Chronicle by Survation in October 2019 showed that 87% of British Jews believed that Corbyn was [ censored word]emitic, with 47% "seriously considering" leaving the country if Corbyn became Prime Minister.