Today there are many opinions if the ends did justify the means.
The United States offered a proposal to move a Native American tribe more westward but after declining they were forced out or killed because the Americans wanted the land and to expand further west. Pushing Native Americans off their land or slaughtering them for the expansion of The United States was completely unreasonable. The U.S had no right to take over because it was the Native Americans land first and that was their only home, they didn't like the idea of moving west as much as the settlers did. What we have today was not worth killing so many people, there could have been another way of doing things. Yes, today there are Reservations but it is nowhere near the land that they once had.
On the other hand, The United States is one of the most developed and wealthiest countries in the world. If we had let the Native Americans stay in their land then the U.S might be a third world country today. Our land would be smaller, groundbreaking inventions would not have been made. If this country is so important that a pregnant tourist will visit our country just so they can give birth to an American citizen then there is nothing that should have been done differently. The American visa is one of the most valuable and cherished items from the eyes of an immigrant. People risk their lives every day just to cross the border and to live here.
In the heart of the Manifest destiny was a belief of cultural and racial superiority. The Native Americans had been a trouble to the settlers and trying to “civilize” them was not working. Americans also saw the Hispanics from Texas to be not proper, which led to the annexation of Texas and taking of Oregon and California. If the ends did justify the means then there were sacrifices that were made in order to put us here today.
en.wikipedia.org/wiki/Manifest_destiny
www.ushistory.org/us/29.asp