Looking back from the other side of the Likud/IDF genocide in Gaza, and the aggressive wars they've launched against a number of neighbouring countries, it's hard to see this "post-mortem" of Corbynism as anything other than a hatchet job;
https://audioboom.com/posts/7480572-labour-s-institutional-antisemitism-crisis
Running interference for the UK establishment's desire to keep UK foreign policy locked to that of the US. By smearing any and all criticism of Israel by the left as "antisemitism".