The practical effect of your observation would be to incentive governments to maintain the feudalism that characterized Ottoman landowners selling the land they owned, but which Arabs lived on. If you have feudal ownership, it becomes unjust in your view for land buyers to kick out the tenant farmers! Rather than incentive feudalism, we should hold the Jews innocent because all they did was buy land, and place moral blame on whom it should reside, the feudal landlords, the Ottomans.

Under your moral blame system, Jews would have been forever barred from merely peacefully buying land because of someone else's sin: Ottoman feudalism. This patently unjust result demonstrates that framing the moral blame in your way is not just or righteous.