That terrorist threat, so organized and so close to the Israeli population centers is intolerable. You do not remove the threat by placating it. The Israelis have to stand up to it and fight it hard, using all of the same logic we apply to the same terrorists who are threatening us. You can;t make peace with it, you have to eradicate it and its nesting grounds.
This plan gives the Palestinians a chance to do that themselves. If they cannot, or if they will not, then the threat within Israel's borders must be eliminated IMHO.