Go back far enough in history and one can find that at one time all races, ethnic groups, etc. were barbarians. Due to circumstances that often had more to do with where an ethnic group was located than anything else, some groups of people advanced toward civility much more quickly than others.
Thus, the following observations are not based upon race or ethnic superiority. We all have skeletons in the closet whether we be white, black, brown, or whether we be Christian, Jew, or Muslim.
The issue of 'who the land belongs to' in the modern age is a complicated one. A case can certainly be made that caucasians took land in North America from Native Americans. Does this mean, then, that the 350,000,000 people living in the United States and Canada must be uprooted and sent elsewhere? The logistics of such a preposterous notion boggles the mind.