Human nature being what it is, people who have benefitted from certain past actions are often, good natured or not, biased towards not making any changes to rectify misdeeds while those who have been harmed by theft or worse crimes see no reason why the descendants of robbers should continue to live off ill gotten booty.
There is an entire legal, financial, and diplomatic industry which exists to return various forms of property, particularly art, that was stolen, expropriated, or "bought" from Jews by non-Jews during the years of German Nazi hegemony, WW2, and the Holocaust. I use quotes around bought because of course sell or die isn't really a true free market transaction. Art museums, some wealthy private art collectors, corporations, and Nazi descendants have not all been immediately willing to turn over such property to Jewish institutions, claimed heirs, or the state of Israel. There have been disputes.
Of course the Nazis were only in power for twelve years. Depending on when you start the clock European nations have been invading and colonizing African and Asian nations for about three hundred to four hundred years.