What is the differences and similarities between bolshevism and nazism? ?

A number of authors have carried out comparisons of Nazism and Stalinism in which they have considered the similarities and differences of the two ideologies and political systems, what relationship existed between the two regimes, and why both of them came to prominence at the same time. During the 20th century, the comparison of Nazism and Stalinism was made on the topics of totalitarianism, ideology, and personality cult. Both regimes were seen in contrast to the liberal West, with an emphasis on the similarities between the two.[1] The political scientists Zbigniew Brzezinski, Hannah Arendt and Carl Friedrich and historian Robert Conquest were prominent advocates of applying the "totalitarian" concept to compare Nazism and Stalinism.

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