Far-right politics are politics further on the right of the left-right spectrum than the standard political right, particularly in terms of extreme nationalism, nativist ideologies, and authoritarian tendencies.
The term is often used to describe Nazism, neo-Nazism, fascism, neo-fascism and other ideologies or organizations that feature ultranationalist, chauvinist, xenophobic, racist, anti-communist, or reactionary views. These can lead to oppression, violence, forced assimilation, ethnic cleansing, and even genocide against groups of people based on their supposed inferiority, or their perceived threat to the native ethnic group, nation, state, national religion, dominant culture or ultraconservative traditional social institutions.
Hitler had a large following as does Trump. Different era, same ideology.