A lot of US Evangelical Christians and Conservatives say "Nazi" when they really mean "Stalinist".
They say this because they've been taught for decades now that "Nazis were Socialists, it's right there in the name" and also that "Nazi Germany is the inevitable end-state of all forms of Socialism, including Social Democracy (Liberalism). The Nazis were democratically elected, therefore we must be vigilant against and prevent elections which might elect Nazis (ie, democratic socialists)".