In addition to them bombarding the very source of their only and basic supplies, they also try to smuggle in explosives:
Israel foils bid to take explosive material into Gaza on aid truck
By Zohar Blumenkrantz and Yuval Azulay, Haaretz Correspondnets
Tags: Gaza, Israel, Palestinians
Israel Airports Authority security personnel on Monday thwarted an attempt to smuggle a chemical substance that can be used to manufacture explosives and rockets, from Israel into the Gaza Strip though the Kerem Shalom crossing. The IAA recovered two tons of the bomb-making material from a truck attempting to smuggle the material into Gaza in the guise of a humanitarian aid delivery.