"Shut up or pack up" is a line used by most totaliritarian regimes (Soviet Union, Nazi Germany, Franco's Spain, China, etc.), to little results. Your "domino effect" theory was the boogeyman used during the Vietnam war and has been rather disproved. Israel's existence and security does not depend on the war outcome in Lebanon but on a lasting peace with Palestinians. Such a peace would take away many of the jihadists' arguments. Maybe not all of them, but enough to strengthen the mainstream Arab and Moslem populations who'd rather go on with their own business.
Prominent Druze sheikh al-Balous killed in Syria (Haaretz)
from the article: Ending the neoconservative nightmare