"Thinkers" On The Right

Many "thinkers" on the far right have started to associate liberalism with Nazisim.
The Nazis believed in racially and ethnically superiority, were very much against multi-culturalism and left-wing activists. So much like today's left, right?
The right used to associate liberals with communists. This is a stretch, but at least there might be a few ideological similarities between the commies and the left.
And I notice that the government in Iran is railing against "liberals and secularists". Why doesn't the far right in this country move over there?