Thanks Kevin Grunewald 
This is a standard propaganda announcement, this idea of Saudi Arabia as a valuable ally in the war on terror must become quaint to move on to a more peaceful world. 
Israel and Saudi Arabia are allied, Iran is the enemy and are proxies in the US war on Yemen allegedly because Iran threatens them through Yemen somehow.  Poor Houthis are gifted with American freedom aka ordnance from Rand, Boeing, GE et al and Trump's deal only entrenches this pipeline of death.

Worse still Atlantic has a great article about how Americans making and shipping death is good for the economy! 

Israel and Turkey, with the Saudis cooperated to create ISIS for the CIA.  Israeli medical units are treating ISIS wounded fighters in Syria, meanwhile the greatest fighters who fight against the Islamists, the Kurds are thrown under the bus and attacked on American soil by Erdogon's goons. 

And patriotic Americans need to be happy about this?