One Problem with Lawsuits over Inherited Art

The lawsuits over inherited art stolen by the Nazis might be used as a precedent by Palestinians claiming their land was stolen in 1948 or even by people claiming reparations for slavery. I have criticized such claims on Usenet (whatever happened to that?) on the grounds that

In the United States, events that occurred for than 40 years ago are regarded as part of the "dead past" and relegated to museums.

That might also apply here.