Hamas has exploited the truce to prepare for future conflict. It is training troops and smuggling in masses of arms (i.e. four tons of explosives). It is stockpiling nonmilitary essentials such as food and fuel, since the truce, with its reopened border crossings, more than tripled the volume of cargo entering Gaza. And it is building bunkers with cement supplied courtesy of the lull. All this will increase IDF casualties in any future Gaza operation, making governments even more reluctant to approve one.
http://www.jpost.com/servlet/Satellite?cid=1218446195173&pagename=JPost%2FJPArticle%2FShowFull