In what way did hate drive the nazi to commit genocide upon the jew of europe

Adolf Hitler was trying cleanse the "German race" of all impurities.  Other "races" like the Gypsies, Slavs, also people of the German race like the Jehovah's witnesses, the disabled and mentally ill were also sent to concentration camps. It's really sad to even read. Hitler just wanted to get rid of them in other words.  

Where are the statements, only the paragraph is here