Israel will not agree to a right to return that might result in the destruction of its status quo. So even if you think that this would be the morally desirable outcome, it is not going to happen. How many of the people displaced during the Nakba are even still alive? We are not talking about letting people displaced a couple of years ago return, we are talking about people and their descendants that have been displaced generations ago, most of them have never lived in the place you want to let them return to. Make them a good enough offer to forfeit their right to return.