I need to look into that. Where does the 3 million number come from? The Nuremburg trials were fed on joint intel but most of it was Soviet supplied.
“According to the 1931 National Census there were 3,130,581 Polish Jews measured by the declaration of their religion.”
JEWISH POPULATION OF EUROPE IN 1933: POPULATION DATA BY COUNTRY
http://www.ushmm.org/wlc/en/article.php?ModuleId=10005161