It was, let's say 1000 years ago and most people affected descended from both perpetrators and victims. You could go as far as saying this kind of violence was important and necessary for the development of civilization; if every human respected property rights for the last 10,000 years we would live in a very different world.
So a 1,000 year old crime is wiped out in the present. When does that stop? How soon to now should the statute of limitations be?
300 year old Native American issues? 150 year old American slavery issues? 100 year old Israel/Palestine issues? 50 year old American discrimination issues?
If I go out and steal something today, obviously there is a legal remedy. How far back does it go? Does it flow through generations?
It seems impossible but there has to be a line or some distinction between historic issues which are necessarily "done" and present issues which deserve justice.
People are deciding these issues but I haven't heard or seen a justification for one way vs the other.