Answer:
Other cultures and nations viewed the ideas in a bad way. Because those ideas made them lose territory that once belongs to them.
Step-by-step explanation:
Manifest destiny idea was a philosophy held during the 19th century in the United States. It was about territorial expansion and it sustained that the U.S. was destined to expand its dominion and capitalism throughout the entire North American continent.
This philosophy was the basis of the Mexican-American war at the beginning of the century and led to the debate about if the new territories conquered would allow slavery. A debate that eventually lead to the American Civil War.
The cultures of the people whom territories were occupied were mistreated, most of them were Native American or Hispanics.
I hope this answer helps you.