Certain reformers amongst the Progressives were very descriptive in their language and disdainful of the very people they were purporting to help - this is a great example of that
Almost every US History teacher tells students about Manifest Destiny, boiling down an explanation of the term to about eight words in a bullet point of a 18 slides presentation that students dutifully copy and recognize out of four other distractors in a multiple choice question. This is the article the phrase comes from - teachers should be forced to read it and explain why they think their teaching of the phrase does any justice to history at all