Cool story bro, and they created a system under which Native Americans still live. Italians don't live under Roman rule, Germans don't live in Nazi Germany. Jews don't live like they did under the Babylonians. That's why nobody is taking any of the oppressive forces in those countries to task for the country's history. Manifest destiny very much exists today just like it did 150 years ago. Again, you list the themes in manifest destiny and tell me you can't find them in our economic sectors.
We judge history literally ALL the time. We judge history literally as it happens. There was literally a massive media drive to have what happened in Sudan called a genocide. Politicians, celebrities, memes, etc. all regularly call the actions of many African dictators 'genocides'. The Armenian people have literally argued for decades that a genocide that happened to them is not recognized. Nobody living in Cuba today thinks that what happened to the Taino population was anything short of a genocide given how few Tainos actually even exist today. There seems to be a general aversion in the US to calling what we has happened on our soil a genocide or even racist.
Manifest destiny was both, it was the drive to remove a people standing in the way of a group's search for economic growth. It used religious and political means to propel one group of people while subjugating a second group. Please stop romanticizing it just because you think we've all profited from it.
What's funny is that you romanticize manifest destiny, complain about similar processes happening all over the world and nobody criticizing those. Who is going around preaching about how amazeballs it was that the Aztecs were decapitating people on hills and how we should all learn to grow from those event? Who in the world is telling the world that the Muslim expansions were kickass and like totally a wonderful time for the countries they conquered? These people simply don't exist. There is a section of our society which study these events and are generally pretty sober in describing them as genocides, conquests, expansions, etc. There is another part which follows a trend, but the premise that we shouldn't be judging history is absolutely bat**** funny.
We regularly do.