If you think "nazi ideology" or their actions are uniquely horrible, you are either historically illiterate, or so parochial that only their particular victims are of concern to you. History, especially twentieth century history, is a charnel house.
Nazi ideology is not uniquely horrible, as other eliminationist rhetorics have existed and led to genocides of their own. Nor are their actions unique in numerical terms, as other authoritarian regimes have engaged in systematic genocides through famine etc. with similarly large loss of life. But Nazism is unique in its combination of rhetoric and scale, and also in its instantiation within a highly developed society…
And one must admit, that at the moment it does not look very good for freedom, democracy and civilsation as a whole.