Revisionism

[Lanell]

Lenin described [revisionism] as the struggle against Marxism within the Marxist movement itself. The revisionists strive to revise Marxism in the direction of serving the interest of the capitalist class, who want the working people to continue working for [exploiters]. Revisionists are the ideological representatives of the bourgeoisie in the communist movement. The revisionists wear a ‘communist’ mask so that they can better divert the communist movement from accomplishing its historical mission of destroying capitalism.
In short, revisionism is the bourgeoisie inside the communist movement. They seek to undermine the principles on which the [Marxist-Leninist] movement is founded. What the revisionists seek more than anything else is to remove Marxism-Leninism from the leadership of the communist movement.

[Cami]

A policy of revision or modification, especially of Marxism on evolutionary socialist (rather than revolutionary) or pluralist principles.

[Marquetta]

asking questions about and trying to change existing beliefs about how events happened or what their importance or meaning is: