In the case of the Kastner episode, around which Jim Allen's play PERDITION is based, even the normal excuse of lack of knowledge of the real nature of events does not exist. It occurred near the end of the war. The USSR had advanced almost up to Germany. Italy and the African bases had been lost. The Nazis were on the run, with a number of key countries, such as Rumania, leaving the Axis. A second front was a matter of months away, as the western Allies prepared their forces. In the midst of all this we find Eichmann, the master bureaucrat of industrial murder, setting up is HQ in occupied Budapest, after the German takeover of the country in April 1944. His first act was to have a conference with the Jewish leadership, and to appoint Zionist Federation members, headed by Kastner, as the agent and clearing house for all Jews in their relationship with the SS and Nazi authorities. Why they did this is not difficult to see. As opposed to Poland, where its three and half million Jews lived in ghettoes and were visible different from the rest of the Polish population, the Hungarian Jews were in integrated part of the community. The middle class was mainly Jewish, the Jews were mainly middle class. They enjoyed freedom of travel, served in the Hungarian (fascist) army in frontline units, as officers and soldiers, their names were Hungarian - how was Eichmann to find them if they were to be exterminated ? The task was not easy, there were a million Jews in Hungary, most of them resident, the rest being refugees from other countries. Many had heard about the fate of Jews elsewhere, and were unlikely to believe any statements by Nazi officials.
Like elsewhere, the only people who had the information and the ear of the frightened Jewish population were the Judenrat. In this case the Judenrat comprised mainly the Zionist Federation members. Without their help the SS, with 19 officers and less than 90 men, plus a few hundred Hungarian police, could not have collected and controlled a million Jews, when they did not even know their whereabouts. Kastner and the others were left under no illusions. Eichmann told Joel Brand, one of the members of Kastner's committee, that he intended to send all Hungary's Jews to Auschwitz, before he even started the expulsions! He told them clearly that all these Jews will die, 12,000 a day, unless certain conditions were met.
The Committee faced a simple choice - to tell the Jews of Hungary about their fate, (with neutral Rumania, where many could escape, being in most cases a few hours away) or to collaborate with the Nazis by assisting in the concentration process. What would not have been believed when coming from the SS, sounded quite plausible when coming from the mouths of the Zionist leadership. Thus it is, that most of the Hungarian Jews went quietly to their death, assured by their leadership that they were sent to work camps.
To be sure, there are thirty pieces of silver in this narrative of destruction: the trains of 'prominents' which Eichmann promised to Kastner - a promise he kept to the last detail. For Eichmann it was a bargain: allowing 1,680 Jews to survive, as the price paid for the silent collaboration over the death of almost a million Jews.
There was no way in which the Jews of Hungary could even be located, not to say murdered, without the full collaboration of Kastner and his few friends. No doubt the SS would hunt a few Jews here and there, but the scale of the operation would have been minuscule compared to the half million who died in Auschwitz.
It is important to realise that Kastner was not an aberration, like say Rumkovky in Lodz. Kastner acted as a result of his strongly held Zionist convictions. His actions were a logical outcome of earlier positions. This is instanced when he exposed to the Gestapo the existence of a British cell of saboteurs, Palgi and Senesh, and persuaded them to give themselves up, so as not to disrupt his operations. At no point during his trial or elsewhere, did Kastner deny that he knew exactly what was to happen to those Jews.
http://abbc.net/historia/zionism/zionhol01.html