Examinations of Israeli and Polish archives have brought allegations that Iwanski exaggerated his war time activities, had made anti-Semitic and anti-Israeli radio and television broadcasts, and as an informant of Polish secret police had spied on Nazi hunter Simon Wiesenthal as an informant against the Jewish Historical Institute .
Investigations of Israeli and Polish archives have uncovered accusations that Iwanski exaggerated his wartime activities, made anti-Semitic and anti-Israeli broadcasts on radio and television, and acted as an informant for the Polish secret police by spying on Nazi hunter Simon Wiesenthal against the Jewish Historical Institute.