Syrian and Lebanese Arabs have scrapped plans to march on Israel’s borders Sunday as “Naksa Day” begins to fizzle out. Actions by Lebanon and Israel to declare areas near the northern border to be closed military zones, along with an American warning that the planned march might be a “provocation,” contributed to the decision to cancel the planned assault. The Ramallah-based Palestinian Authority has stated its intentions, but without support from foreign Arabs, a demonstration for several million foreign Arabs to immigrate to Israel might be seen as a public relations bommerang. A cornerstone of the Saudi Arabia 2002 Initiative,...