DAVID LLOYD GEORGE stated that the First World War was conducted as if there were no limit to the number of men who were fit to be thrown into the furnace. He stated that he had been to the front and witnessed men marching into the furnace.

Hitler fought in the First World War and knew that two million Germans had been immolated in the flames of war (see also "What did Hitler do in the First World War"). 

In Hitler's mind, however, Jews had escaped immolation in the War by shirking their duty to fight (although factually this was not true--German Jews died in the same proportion as non-Jewish Germans).

 Hitler compelled Jews to be immolated in ovens in death camps--since they had not been immolated in the First World War. 

The First World War and Holocaust were two sides of the same coin: the immolation of millions of human beings.