Leftwing Anti-Sematism.

This is anti-Semitism of the type that got Ken Livingstone the sack. WRT the holocaust RW anti-Semitism follows the narrative of either the holocaust didn’t happen or if it did it was a good thing, LW anti-Semitism shifts the blame for the holocaust from the Nazi’s onto the Jews often calling them Zionists and accusing them being callous or manipulative/untrustworthy towards other Jews. The definition of Zionism is someone who believes in the state of Israel and cares for the welfare of Jews, Left wing anti-Semitism Labels Jews as Zionists while accusing them of being hostile to the welfare of other Jews, a contradiction masked in semantics (Of course anti-Semites will happily dip into either political wing of anti-sematism).

The arguments draw heavily from a fringe Rabbi called Rabbi Gedalya Liebermann who makes multiple claims of the Nazis willing to ransom Jews up to 1944 with no independent citations, which builds into the narrative that the nazis only wanted the jews expelled rather than exterminated. The link below shows how his writings are used, they can be found on multiple conspiracy and far left sites.

[rense.com]

What has been omitted gives a clearer picture. German jews were not quick to leave Germany for a number of reasons. Firstly the 1935 Nuremburg Laws stripped jews of citizenship and the ability to travel, many that did escape used papers forged by various Ambassadors and consulate works from over 30 embassys including countries like Bolivia and China, secondly German Jews thought it was people of ill repute who emigrated(Usually to the USA), and thirdly the Jews expected the worse but not the impossible.

After KristalNacht in November 1938 the policy of the German National Socialist Party was to not let Jews leave to prevent Witness testaments stack up against them(as well as slave labour and hostage value in an impending war). All though a lot of evidence of the final solution was destroyed a lot of evidence was recorded like Transfer documents, ie 40,000 jews from Rotterdam to Belson then on to Auschwitz.
Any evidence of attempts to trade Jews and build up the narrative that they just wanted to rid themselves of the Jews not destroy them would have been retained.

Digging deeper it is not difficult to find evidence that Hitler wanted the Jews destroyed rather than evicted, as well as various rants in Mien Kampf there is this quote by Hitler in 1922..

“"If I am ever really in power, the destruction of the Jews will be my first and most important job. As soon as I have power, I shall have gallows after gallows erected, for example, in Munich on the Marienplatz-as many of them as traffic allows. Then the Jews will be hanged one after another, and they will stay hanging until they stink. They will stay hanging as long as hygienically possible. As soon as they are untied, then the next group will follow and that will continue until the last Jew in Munich is exterminated. Exactly the same procedure will be followed in other cities until Germany is cleansed of the last Jew!" '

As for Corbyn, he is well documented hob nobbing with Hamas and groups advocating genocide of the Jews, this parallels Hitlers warm relationships with Islamic leaders who wanted the Jews destroyed e.g. the Mufti of Jerusalem. Given the progressive nature of the holocaust which began soon after Hitlers election in 1933 with the Nuremburg laws and ended with Death camps a decade later you can't really blame Jews for being nervous as they see history begin to repeat itself and not wanting to make the same mistake again.