It's just my sense, but I think Israel is really tired of playing defense.
There is near-universal agreement among Israel’s Jews that it shold obliterate Hamas. However, the government is very reluctant to directly oppose US dictates except in those areas where its survival is at stake. For that reason it is continuing to destroy the tunnels but not attacking forcefully to wipe out Hamas. Hamas, of course, is a Muslim Brotherhood affiliate supported by the Obama administration.