Nazis, communists, Fascists, and Socialists.  They are all left-wing and totalitarian.  They all want a strong central government controlling the economy and the lives of all the people.  What exactly is a Right-wing extremist? - Somebody who wants almost no government and believes in property rights and rule of law.  Are right-wing extremists a danger or a threat?  No, they just don't want the government stealing their stuff and controlling their lives under threat of violence.  Are left-wingers a threat and danger.  Yes!