Here is Jesus addressing his eleven remaining disciples in Matthew 28:18-20.
And Jesus came and spake unto them, saying, All power [ἐξουσία] is given unto me in heaven and in earth. Go ye therefore, and teach all nations [ἔθνη], baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: Teaching them to observe all things whatsoever I have commanded [Faustus: ἐνετειλάμην –there’s that word again] you: and, lo, I am with you always, even unto the end of the world. Amen.
So if I get this right, and I see no reason to think I’ve got this wrong, they’re supposed to head out and make everything and everyone Christian. Not explicitly said, but surely implied, is that this process if successful means wiping out all other religions, non-religious worldviews, and ways of life, on a planetwide basis. The great diversity of humankind is to be replaced with a Jesus-based monoculture.
I can think of many names for the aspiration embodied in Jesus’ command, of which “cultural imperialism” is perhaps the most diplomatic.