While Israel fervently attempts to terrorize the Palestinians into submission in Gaza, many observers have started to wonder why Hizbullah has refrained from stepping in militarily to assist its brothers-in-arms, Hamas. Such musings fail to take account of the constraints on Hizbullah’s room for action, as well as the circumstances under which Hizbullah would ignore such constraints. The question that should be posed is not so much if Hizbullah will act, but when.