It discovered that across the political spectrum, conscious hatred of Jews was very low, and that it was exhibited in equal measure from the "very left-wing" to the "fairly right-wing". The only exception, as one might expect, was on the "very right-wing", where virulent anti-semitism was much more prevalent.
That finding was confirmed last week by surveys that showed a significant rise in violent, anti-semitic attacks across Europe as far-right parties make inroads in many member states. A Guardian report noted that the "figures show an overwhelming majority of violence against Jews is perpetrated by far-right supporters".Supporters of overseas war
So what is the basis for concerns about the Labour Party being mired in supposed "institutional anti-semitism" since it moved from the centre to the left under Corbyn, when the figures and political trends demonstrate nothing of the sort?
A clue may be found in the wider political worldview of the eight MPs who have broken from Labour.
All but two are listed as supporters of the parliamentary "Labour Friends of Israel" (LFI) faction. Further, Berger is a former director of that staunchly pro-Israel lobby group, and Ryan is its current chair, a position the group says she will hold onto, despite no longer being a Labour MP.
So extreme are the LFI's views on Israel that it sought to exonerate Israel of a massacre last year, in which its snipers shot dead many dozens of unarmed Palestinian demonstrators in Gaza in a single day. Faced with a social media backlash, it quietly took down the posts.
The eight MPs' voting records except for Gavin Shuker, for whom the picture is mixed show them holding consistently hawkish foreign policy positions that are deeply antithetical to Corbyn's approach to international relations.
They either "almost always" or "generally" backed "combat operations overseas"; those who were MPs at the time supported the 2003 Iraq war; and they all opposed subsequent investigations into the Iraq war.Committed Friends of Israel
In one sense, the breakaway group's support for Labour Friends of Israel may not be surprising, and indicates why Corbyn is facing such widespread trouble from within his own party. Dozens of Labour MPs are members of the group, including Tom Watson and Ruth Smeeth.
Smeeth, one of those at the forefront of accusing Corbyn of fostering anti-semitism in Labour, is also a former public affairs director of BICOM, another stridently pro-Israel lobby group.
None of these MPs were concerned enough with the LFI's continuing vocal support for Israel as it has shifted to the far-right under Prime Minister Benjamin Netanyahu to have stepped down from the group.
Nor was their committed support for Labour Friends of Israel shaken by a 2017 undercover Al-Jazeera documentary investigating the Israel lobby's tactics in the UK. It revealed that the LFI and the Jewish Labour Movement were both covertly working closely with an Israeli embassy official, Shai Masot, to damage Corbyn.
In fact, the secret filming recorded Ryan inventing a false claim of anti-semitism against a Labour party member.
She also admitted on camera that she was in almost daily contact with Masot, and was filmed speaking to Masot about £1 million he had secured on the LFI's behalf to fly Labour MPs on junkets to Israel as part of recruiting them to the Israeli cause.'Wrong kind of Jews'
Anti-semitism has taken centre stage in the manoeuvring against Corbyn, despite there being no evidence of significant hatred against Jews in the party. Increasingly, it seems, tangible abuse of Jews is of little interest unless it can be related to Corbyn.
The markedly selective interest in anti-semitism in the Corbyn context among the breakaway MPs and supposed anti-semitism watchdogs has been starkly on show for some time.