He has enough domestic troubles of his own (for instance, the recent scathingindictment of his government by 20 Palestinian intellectuals and parliamentarians), and is keenly aware that the latest withdrawal will make these troubles worse.
Just read a scathing, well-written indictment of the current state of Goldman Sachs, an op-ed in the NYT by Greg Smith, an executive director of the firm, and head of its United States equity derivatives business in Europe, the Middle East and Africa.