Ders: Kastner made a deal with Eichmann. He saved over 1500 Jews by hiding that report. No one knows what would have happened if he had publicized things and not gotten that train full of Jews out. Maybe more would have lived; maybe more would have died. But to just make a blanket statement that he was “in cahoots with Eichmann” is Motzi Shem Ra.
And one Zionist doing such a thing doesn’t make the whole Holocaust the Zionists’ fault. Nor does it even say anything about any other Zionist. Can I call all Chareidim murderers if I can find one Chareidi in history who ever committed murder?