Jeffrey Goldberg interviews Martin Indyk. It's hard to disagree with this:
Hamas enjoys popular support in the West Bank as well as Gaza because it has been seen to be more effective and less corrupt than Fatah and the Palestinian Authority. Under its current leadership Fatah is incapable of reforming itself and as long as that is the case Hamas will enjoy an advantage. However, the Palestinian Authority under non- Fatah PM Salam Fayyad is showing that it can establish order and promote economic development in the West Bank. This has improved its credibility and is one reason that Hamas decided to break the ceasefire in Gaza (because they felt they were losing ground politically). In the wake of the Gaza war, a real West Bank settlements freeze and the dismantlement of unauthorized outposts would do more than anything else to enhance the PA's credibility because it would show in a tangible way that moderation pays where violence only brings devastating destruction.