Netanyahu is doing the best he can with an unpredictable and uncooperative Obama. There is no guarantee that this problem will be or can be solved during Netanyahu’s tenure. Obama will not risk war and has come to terms with a nuclear armed Iran. He has defacto imposed the terrifying peace of MAD on the Jewish state.
The ongoing election campaign in Israel, also, would be an issue. Netanyahu wants to be voted back into office, and threatening a war with Iran might be a drawback.