This is what many of them believe,and they are dangerous:
"A communist revolution is a proletarian revolution often, but not necessarily, inspired by the ideas of Marxism that aims to replace capitalism with communism, depending on the type of government, socialism can be used as an intermediate stage to Communism. The idea that a proletarian revolution is needed is a cornerstone of Marxism; Marxists believe that the workers of the world must unite and free themselves from capitalist oppression to create a world run by and for the working class. Thus, in the Marxist view, proletarian revolutions need to happen in countries all over the world."
https://en.wikipedia.org/wiki/Communist_revolution
"A communist revolution is a proletarian revolution often, but not necessarily, inspired by the ideas of Marxism that aims to replace capitalism with communism, depending on the type of government, socialism can be used as an intermediate stage to Communism. The idea that a proletarian revolution is needed is a cornerstone of Marxism; Marxists believe that the workers of the world must unite and free themselves from capitalist oppression to create a world run by and for the working class. Thus, in the Marxist view, proletarian revolutions need to happen in countries all over the world."
https://en.wikipedia.org/wiki/Communist_revolution