Sarah A. Hoyt introduces the useful concept of colonialist Marxism in this essay. She explains it this way:
Most of the left’s ideas on “defeating colonialism” envision themselves as benevolent colonial masters. In fact, the colonialism of Marxist ideas in Africa is what has made it hell on Earth, far worse than any colonial overseers could do. By turning their best and brightest into Marxist apostles at our “finest universities,” they get to send these ideas back to Africa. There was some idea they would flourish there among people unsullied by greed and the wish to succeed individually.... It didn’t. Instead it has made Africa worse than ever before. And this was done by turning its favorite sons, its brightest sparks into poison pills. Colonialist Marxism is appalling and responsible for the deaths of millions. As is Marxism everywhere.
I would probably have called it Marxist colonialism, but either is fine.