I must confess I too once believed that Kasztner was ethically compromised during the war. I then read a bit more about him. Take a look at the following sites for more accurate information about him:
http://www.kasztnermemorial.com/
http://en.wikipedia.org/wiki/Rudolf_Kastner
Indeed I can’t understand Katner’s defense of Kurt Becher, except to ascribe it to a desire on his part to remain a “player” after the war, and to some form ot Post Traumatic Stress Disorder. But to suges that he collaborated with Eichmann y’msh is simple slander.