Is it fair to compare Dershowitz to a Nazi crackpot?

I know I'm going to hurt the feelings of Jonathan Freedland. But I can live with that.

This is from Alan Dershowitz:

The truth is that the Palestinian leadership, supported by the Palestinian masses, played a significant role in Hitler's Holocaust....Husseini's significant contributions to the Holocaust were multi-fold: first, he pleaded with Hitler to exterminate European Jewry and advised the Nazis on how to do so; second, he visited Auschwitz and urged Eichmann and Himmler to accelerate the pace of the mass murder; third, he personally stopped 4,000 children, accompanied by 500 adults, from leaving Europe and had them sent to Auschwitz and gassed; fourth, he prevented another two thousand Jews from leaving Romania for Palestine and one thousand from leaving Hungary for Palestine, who were subsequently sent to death camps; fifth, he organized the killing of 12,600 Bosnian Jews by Muslims, whom he recruited to the Waffen-SS Nazi-Bosnian division. (Dershowitz in Der Jerusalem Stuermer)

This is from a "racist, white supremacist and anti-Jewish" Adolf-worshipping website:

Jews were responsible for getting the US to enter WWI on the side of Britain, which they did in exchange for the promise of a "Jewish homeland" in Palestine, which Britain then controlled. This promise was rendered in the form of the Balfour Declaration of 1917, supposedly written by British Foreign Secretary Arthur Balfour to the chief representative of the Jewish community in Britain and head of the famous banking family, Lord Rothschild, but actually written collectively by major Jewish world leaders. ... Beyond this, the Jews may have had a hand in actually beginning WWI, inasmuch as the assassination of Archduke Ferdinand of Austria, which set off the war, was carried out by men which two sources I am now unable to locate claimed were Jews..(The Birdman)

Similar arguments, similar racist agenda, similar playing fast and loose with evidence (see also this and this Tom Segev Times article and especially this chez Lenin (including the fabulous comments section which makes up for the graduate seminar about the Mufti that Dershowitz never attended)). But the Nazi at least qualifies his filth with phrases such as "may have a hand," whereas the Zionist presents substance-free allegations as solid facts. And the Nazi, unlike the Zionist, doesn't have the nerve to say explicitly that his grotesquely exaggerated villains were "supported by the masses." It is an indictment of the moment we're in that a respectable Zionist apologist with a Harvard chair would pay even less heed to accurate sourcing and rules of evidence than a white supremacist crackpot. The final difference, the Nazi fabulist is an object of scorn and ridicule, as he should be. The equally vile Dershowitz, as the sycophantic letter of Hampshire College President Ralph Hexter describes him, is in "high esteem."

Major Jewish organizations invited Dershowitz to speak at the U.N. in may 2009, about antisemitism and in commemoration of the holocaust, no less. He delivered a hatefest based on his stock in trade fabrications and insinuations. Then these very Jewish organizations lose their marbles because some dare see a similarity between Zionists and Nazis. Here's an idea. If you don't want to be likened to Nazis, don't invite an advocate of Nazi-like policies and a purveyor of Nazi-like scholarshit to speak at your events! If you don't want to legitimize abusing the memory of the Jewish victims of the holocaust, don't be the first in line to piss on their graves! Have some decency!