The article mentions aspirations to acquire Greenland in the 1800s and 1900s but skips over an important detail. In 1916, America agreed to recognize Denmark’s sovereignty over Greenland as part of the treaty and deal to acquire the Virgin Islands. Prior history doesn’t matter and later interest doesn’t matter - a treaty is binding. Not to mention, military aggression in the modern era is unacceptable and will quickly lead to a decoupling away from America.
https://en.wikipedia.org/wiki/Treaty_of_the_Danish_West_Indi...