I think this is all down to a failure of leadership - that is, Jeremy Corbyn's leadership. A good leader has the judgment to see what needs to be done when a problem blows up that threatens him or the reputation of his party.
Unfortunately Jeremy Corbyn and his close associates have not always exercised good judgment, as this latest lamentable episode demonstrates.
If he had had good judgment and good advisers Jeremy Corbyn would have taken more effective action to deal with the rise in the numbers of anti-semitic complaints and abuse against Jewish Labour MPs. It should have been obvious that the problem was going to be toxic for him and his party and reflect on his leadership eventually.
What he should have done in the first place is to have created an independent panel to deal with these complaints - especially if he suspected that there were staff in Labour HQ who were plotting against him. He was the Leader and he had the power to do this, but he either never thought of it or if he did, chose not to pursue it. Instead he put too much trust in his close associates.
Did Jennie Formby have any experience in setting up complaints systems, I wonder? I worked with someone who was tasked with this and it is not a simple matter. Karie Murphy was tasked with running the last election campaign. Had she run one before on this scale? Candidates in marginal seats complained that they didn't receive as much support as those in hopeless seats who were supporters of the Leader.
It is noteworthy that Jeremy Corbyn focus on the numbers of complaints. It is not the actual numbers that matter but his failure of the party he led to have dealt with them adequately. This is true whether there had been two complaints a year under his leadership or 2000 complaints a year.
His attempt, through his statement, and the attempt of his supporters in turn, to portray him as the victim here is deeply upsetting to the victims of the anti-semitic abuse whose suffering was prolonged because the complaints system was slow and ineffective.
Instead of apologising to them he has shown through his statement that all he really cares about is protecting his own reputation. The buck stopped with him, even if he and his supporters choose to ignore that fact.