But also note that this was about 90% of polish jews, and something like 10-15% of ethnic poles.
(90% from https://en.wikipedia.org/wiki/History_of_the_Jews_in_Poland; 10-15% back-of-the-envelope from that plus https://en.wikipedia.org/wiki/Holocaust_victims#Poles, giving a non-Jewish population of a little over 30,000,000.)