Q- How did the Nazis proceed to realize their murderous racial ideology by eliminating the undesirable?
Answer- Nazis does not count only Jews in undesirable but there were other too. Gypsies and Blacks who lives in Nazi Germany were also included in it. Nazis main motive was to make a nation of only pure Aryan race people. For this motive they murdered or killed lots of undesirables in Gas Chambers and Concentration camps.
They were widely prosecuted. Even Russians and Poles were considered subhuman and hence undeserving of humanity. When Germany occupied Poland and parts of Russia, captured civilians were forced to work as slave labour. Many of them died simply through hard work and starvation.