According to Friedlander, the origins of the Holocaust can be traced back to the coming together of two lines of Nazi policies: the antisemitic policies of the Nazi regime, and its "racial cleansing" policies that led to the Action T4 program.
Friedlander argues that the genesis of the Holocaust is rooted in the convergence of two facets of Nazi policy: the antisemitic measures implemented by the regime and their "racial cleansing" initiatives, which included the Action T4 program.