Argument: Damaging Hamas economically is a legitimate security interest
"WSJIDEBATE: Israel’s Gaza Blockade Is Justified. Shikhar Singh: Yes, Legally and Morally." June 8th, 2010: "There has been shrill criticism of the blockade and its effectiveness in the long term. Much of that maybe true but the point is this: if Israel perceives it can minimize the threat from Hamas using economic coercion, then that becomes central to its security concern whether it is successful or not. In that sense, the economic blockade (contestable as it may be), is part of Israel’s security apparatus."