Adelston not withstanding, most of the smart money was put into Obama's coffers during the last election campaign. The promise he gave in return for that money was that he'd visit Israel early in his 2nd term. That's why he's going i.e. he promised the money-bags that he would, and now he has to make good on that promise. Nothing more. No less.
Netanyahu orders more demolitions of terrorists' homes in attempt to crack down on terror (Haaretz)