In the old days. People have been invading each other since the very beginning. Even the countries now in existence took the land from someone else.
If we are going to right those wrongs, then everyone has to give their land up to someone else. I feel like the Indians were screwed over pretty bad, but I don't feel responsible, and I don't feel a need to "make it up" to them.
My ancestors came from Europe after the Indians were wronged, so you can't blame me that way either, but I bet my ancestors stole land from someone in Europe somewhere along the way.