My take on this is that it all revolves around criticism of Israel and how Palestinians are treated by the Israelis as second class citizens. This is something many left wingers agree with. I spent a summer there working for Oxfam and saw many things that confirmed this. There are many Jewish critics who would support this POV too.
However, the crunch seems to be that many Labour members have gone on to imply that therefore the state of Israel should be opposed and is not fit to be a country in its own right. To suggest Jews be deprived of their nationhood is in itself anti-semitic thought.
Tory MP regrets stag party's Nazi toasts, SS costumes and waiter taunts
A Conservative MP who attended a party where friends allegedly chanted Nazi slogans and dressed up in SS uniforms, has apologised for "any offence that was caused" at the event.
Aidan Burley used the social networking site, Twitter, to say he did "deeply regret inappropriate behaviour by some guests at a stag party" he attended and was "extremely sorry for any offence that was caused".
https://www.theguardian.com/politics...s-nazi-slogans
This 'cutting' is worth reading:-
At the beginning of April 2018, The Sunday Times reported that it had uncovered over 2,000 examples of antisemitic, racist, violent threats and abusive content in non-public Corbyn-supporting Facebook groups, including frequent attacks on Jews and Holocaust denying material.[166][167] The 20 largest pro-Corbyn Facebook groups, which have a combined membership of over 400,000, were reported to have as members 12 senior staff who work for Corbyn and shadow chancellor John McDonnell.[168] The messages repeatedly targeted Labour MP Luciana Berger and Jonathan Arkush, president of the Board of Deputies of British Jews.[169][167] A Labour Party spokesperson said the groups "are not officially connected to the party in any way". However, Labour MPs urged Corbyn to instruct his supporters to shut down abusive groups.[170][171]
No official links with Labour.
Still no eveidence of anti semitism within the PLP.
Jews are incredibly influential in the USA, so much so that Israel is allowed carte blanche in commiting one war crime after another. Not satisfied with this, they seem to be seeking influence over the British political landscape now.
Israel has to be accountable, writing off anti Israeli comment as anti semitism is an easy out and should not be allowed traction.