The thing about natives in the US is that they had already been decimated by smallpox by the time settlements were created. It was easy to see a virgin continent becuase even in the 17th century the colonies did not have a very large native population.
Right. American civilization
is built on postapocalyptic ruins, which status
can be traced back to European contact, but a lot of it was unintentional (if welcome from the European perspective). This doesn't, of course, excuse the immense moral crimes that the settlement process did entail, any more than shooting somebody magically becomes less bad if they're dying of a heart attack that you somehow caused.