Weaken Hamas through diplomacy
We have already learned that we can't destroy a terrorist group through military means. The most effective move would be moderate support for PA President Abbas' request to the UN for recognition of the PA as a non-member state.
The primary short-term goal set for Operation Pillar of Defense is to hit Gaza-based terrorism hard. In order to get the most out of this military operation, Israel needs to try to make sure the damage it causes will weaken the Hamas military wing for the long term.