The idea may make sense in terms of tipping the scales against withdrawal and saving Israel some real estate, but it would leave the country morally depleted. Landau knows very well that his cry to exclude the Arabs will become the mantra of the rabble who have different motives from his, and will grasp at any excuse for open racism. And it will become the flagship of Israeli Arab politicians who are only too keen to rub salt into the wound of existing inequality. As critical as the question of who will vote is the formulation of the question that will be put to the people. Such a question would give the government an advantage.
People can look at the agreement and make a decision.
These are things that are going to have to be decided by our lawmakers, and the arena will be the Knesset. At present we are all focused on whether the governing coalition can survive. The National Religious Party, Yisrael Ba'aliya, and some in Shas say openly that they are against withdrawal. But, at the end of the day, ministers usually toe the line. The Knesset, on the other hand, is a different matter, and if those opposed to withdrawal feel they have lost at the cabinet level, the Knesset is going to be an interesting battleground indeed.