The Holocaust - that is, the Nazi genocide of the Jews - began in 1941. The number of Jews killed by the Nazis before the start of World War 2 was about:
(There were an estimated 9.5 million Jews in Europe when World War 2 started, so at that stage the percentage would have been relatively small).
The mass killings started later - with the use of mobile killing units from July 1941 onwards. Routine mass gassings began at Chelmno on 8 December 1941.
Of course, as is well known, by May 1945 about 6 million Jews had been slaughtered.
According to the Jewish Virtual Library, world Jewish population in 1939 was 16,728,000. The US Holocaust Memorial indicates that European Jewish population in 1933 was approximately 9.5 million, 60% of world Jewish population (15.3 million) and 1.7% of the overall European population.
In August 1939, on the eve of World War 2 Poland had about 3.3 million Jews. It had easily the biggest Jewish population in Europe.
It reduced the Jewish population by about two thirds.
About 18 million.
12,000 after the houlocaust 6,000
Europe's Jewish population.
Very few lost thier lives in 1939, most died in 1942.
1939 (estimated Jewish population of Poland on eve of World War 2) : 3.3 million2011 (estimated Jewish population of Poland): 8,000
The Jewish population.
between a third and a half
between a third and a half
Around 9.5 million