Native Americans were massacred and their lands confiscated.
Japanese-Americans suffered a similar fate regarding property.
Confiscations from Japanese-Americans During World War II
Will Hispanics suffer a similar fate if Republicans have their way?
By the standards of modern ethics, what we did to the Indians was wrong. But it's in the past, and cannot be undone, now.
I do think it is worth pointing out that when Europeans arrived on this continent, no organized nation existed here, and no organized set of rules or enforcement mechanisms regarding immigration. There was really nothing to stop the influx of new, uncontrolled immigrants from taking over the land, and displacing and destroying what cultures and people previously occupied it.
Now that we've established such a large and powerful and important nation, do we really want to allow the same thing to happen to us? Unlike those that we displaced in order to create this nation, we have the means to defend it against foreign invasion. But if we fail to do so, then ultimately, our fate will be the same as that of those who were here before us.
The Japanese-Americans that were abused during WWII are a completely different matter. What was done to them was wrong, and unjustifiable; the act of a President who had already showed an unprecedented degree of contempt in other areas for the Constitution of this nation, and for the principles upon which it is based.
The Japanese-Americans who were interred were, however, legitimate U.S. citizens, unlike the invading foreign criminals that are the subject of current controversies. As citizens, they had the right to be here, and they had the right to the same protection of our laws as all citizens; and the FDR administration committed a great crime against them.
It is a Constitutionally-assigned power and duty of our federal government to defend this nation and its people against foreign invasion. By willfully refusing to do so, our President and his allies are committing felony-level malfeasance. Further, by using the power of their offices to promote the interests of invading foreign criminals, to the detriment of the American people, the actions of these corrupt officials meets the Constitutional definition of treason, as found in Article III Section 3 of the Constitution. This is the only crime actually defined as such in the Constitution itself, and the highest crime that any American can commit, and is traditionally punished by firing squad.