Adolf Hitler and the Nazi regime targeted Jews for persecution and mass murder primarily because of their extreme antisemitic ideology, which viewed Jews as a dangerous racial and political enemy. Hitler believed in a racist ideology that propagated the idea of a "pure Aryan race" superior to all others, and considered Jews as a corrupting force responsible for Germany's problems, including its defeat in World War I and societal decline. This hatred was radicalized into state policy aiming for the complete removal, and eventually, the extermination of Jews in Europe. The Nazis developed laws and policies to exclude Jews from German society and ultimately enacted genocide during World War II, known as the Holocaust, in which six million Jews were systematically murdered. The motivation combined deeply ingrained antisemitism with political, social, and racial doctrines that dehumanized Jews and blamed them for a range of issues, leading to the Nazi drive to make Germany and Europe "free of Jews" (Judenrein). This genocide was facilitated by Hitler's leadership, Nazi bureaucracy, and collaborators across Europe, with the final decision and implementation rooted in Nazi ideology and the wartime context. In summary, Hitler killed Jews because of his and the Nazi party's radical antisemitic beliefs, their racial ideology prioritizing Aryan purity, and the political use of Jews as scapegoats for Germany's troubles, which escalated to the Holocaust's mass murder campaign.