Spartan 05/28/2017 (Sun) 23:20:28 No. 25491 del
Arms, construction, oil, tech, private security etc, plenty of money to be made in the middle east. You give them money and support so they buy American for more than what they get in support (with the notable exceptions of the Egyptians, who control the Suez canal and the Israeli's, who have a lot of influence in Washington). In return the leaders get a sense of security. If you don't, the Iranians, Turks and/or Russians and possibly the Chinese will. The Chinese is sitting the conflicts out, but I wouldn't be surprised at all if they started investing heavily and vying for contracts once the dust settles, they've been watching and learning and the Chinese companies are much better equipped for the job of rebuilding a country than their counterparts in Russia and Iran.

tl;dr to further US business interests