Imperialism is more about bullying than heroism.
“The Black Man’s Burden” is a poem written by African-American clergyman H.T. Johnson and published in April 1899, as a response to Rudyard Kipling's “The White Man’s Burden” published earlier the same year. Kipling's poem was a call to the U.S. to assume colonial control over the Filipino people.
In his response, Johnson is writing about how colonialism is not a 'burden' in the sense of a moral duty the white man has to help the natives, but rather something cruel to do to these people: "menace feeble folk," "brook your rifle's smoke."