Original sentence: Hitler (and the Italian fascist Mussolini) started by working within socialist groups organizing workers, and while there is still no consensus among historians over the character of National Socialism, it is generally considerd to have allied with the political right.It is generally associated with the rise of fascism.National Socialism, commonly shortened to Nazism or sometimes Naziism, originated as a nationalist movement in European countries after World War One; and refers especially to the movement of the German Nazi Party under Adolf Hitler
Edited sentence: Both Hitler and Mussolini started not from a right-wing, but a workers' party.National Socialism, commonly shortened to Nazism or (less frequently) Naziism, originated as a fascist movement in Europe, and refers especially to the movement of the German Nazi Party under Adolf Hitler.There is still no consensus among historians over the character of National Socialism apart from that it was a near-global phenomenon