Spot on observation from Stephen Pollard in The Telegraph:

"One might say that the irony that he was launching a report condemning inappropriate comparisons with Israel was lost on him. But, as I will explain, it wasn't lost at all; it was deliberate. Some have tried to argue that his words do not compare Israel with Isil. You have to wonder if they can read. His point is that both Israel and Isil are extremists, terrorists, call them what you will. And while Muslims are decent because they do not support Isil's actions, so too Jews are decent when they do not support Israel. And, of course, only when they do not support Israel.

You could describe this as cloth-eared, or even stupid – and since he became Labour leader, the narrative has usually been that Mr Corbyn isn't up to the job, doesn't get it, isn't really to be taken seriously. But that is to give him credit he does not deserve.

The truth is far more unsavoury. It's clear from his speech that for Jeremy Corbyn, anti-Semitism is something to be weaponised. This was not some off-the-cuff remark, some slip. These were his – or probably Seumas Milne's – considered words. At a meeting on anti-Semitism, he thought the most appropriate thing that he could say was to compare Israel with Isil. This is hard-Left dog whistle politics. With "anti-Zionism" a defining feature of the hard-Left, this is using anti-Semitism as a tool."