The fact remains that Naz Shah needed no help from Ken. He chose to weigh in on her behalf and to suggest that Hitler was a Zionist, based, one is led to understand, on a book by a self-hating Jew, Lenni Brenner, which implies that the Jews collaborated with the Nazis to get to Palestine in 1932. According to Ken, Hitler was not intending to harm the Jews, just to deport them until “he went mad and ended up killing them”. So you see, Mein Kampf was the work of a philo-Semite. And Eva Braun made kneidlach and planted trees in Tel Aviv.

Ken refused to apologise. His repeated defence was to quote, out of context,  Netanyahu’s remark that Hitler wanted expulsion not extinction. (Hitler was indeed influenced by the apparent indifference to the fate of the Jews before 1939: 32 nations, including the US and UK, refused to take in Jewish refugees.)

Then, in a Swiftian turnabout, union leaders declared it was all down to “disgruntled Blairites plotting Corbyn’s downfall, who engineered this whole debate”. I wonder which DB forced Naz Shah to write that racist blog in the first place?

More recently still, when the Hezbollah commander Mustafa Badreddine was killed, the Israelis were regarded as the immediate culprits, until Sunni jihadists claimed the murder for themselves. It reminded me of a debate on Burmese oppression where John Pilger preceded me on a platform to declare that Israel was responsible for the Generals’ 40-year junta. If there’s a blame vacuum to fill, look no further.

Here’s a fresh conspiracy theory, for those who need such things: what if Livingstone started the whole mishagas on purpose to galvanise the anti-Semitic extremists into voting — and voting his way? Some sacrifice. He gets to potter around his newt pond for nine months until Corbyn quietly brings him back into the arena.

The fact is that nobody cares about the Jewish vote. We are 240,000 people in Britain. The more anti-Semitic Labour’s private agenda is, the more votes they get from those millions who are programmed to hate and fear us. Corbyn and Sadiq Khan and Livingstone have embraced and entertained those who incite the murder of Jews and the destruction of the Jewish state. Corbyn knew the provocateurs, extremists and infiltrators in his party but prevaricated in warning themto stop their racist behaviour and in denying them platforms.

Meanwhile, on Sunday morning TV, the most hate-filled studio “discussion” took place between Israel bashers and defenders, hand-picked, it would seem, by Katie Hopkins. Lunatic, petrifying, anti-Semites — the worst being self-hating Jews who prefaced each remark with “I’m Jewish myself, but . . .”.  Shame on the researchers. It made me feel sick all day.

The Palestinian cause is as important a cause as the occupation of Tibet, Chechnya, Crimea, Kurdistan, Northern Cyprus. I won’t go on because they will accuse me, as they always do, of “what-about-ism” and never, never give me an answer as to why they don’t give a flying fart about the “right to return” of any of these other oppressed peoples. So, as I said, I did not respond. I am too tired. I am 4,000  years too tired.