I don't want to get into it here, as the numbers of dead in any war are 'cooked' by both 'sides' during and after the conflict to further each of their agendas. Scant records are kept.

But anyone can google around and find that six million dead in the holocaust (burnt offering) is probably a cabbalistic/numerologial number used to fulfill the prophecies. It was mentioned many times before the German genocides ... and I believe in the Talmud.