The Hussein-McMahon correspondence, the Sykes-Picot agreement, and the Balfour Declaration.

After World War One, the Arabs claimed that the British had "stabbed them in the back" by not granting them an independent Arab state or states. Assess the Hussein-McMahon correspondence, the Sykes-Picot agreement, and the Balfour Declaration. Were the Great Powers duplicitous or just muddling through? Are the Arabs correct to believe that they were stabbed in the back?