I expect their defense mechanisms to be "if the US even blinks, fire a dozen more rockets at the oil refineries where US troops are stationed".
That meeting with Trump yesterday that Trump didn't announce? I think it's safe to assume Trump has called upon SA to help. It's not like Iran will be making a new enemy.
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It's complicated.
For one, nobody on these forums expected successful diplomacy.
For two, yes he campaigned on hating Muslims and calling them terrorists.
But for three, he also said he's get us out of war in the Middle East, and said Clinton would start one. Trump is a bully, and threatened people with force he didn't really plan to use on people capable of hitting back very hard.
It's a special kind of irony that someone who campaigned on and ran on promises of violence and hatred is actually about to break a campaign promise based on the situation. But then, when someone promises multiple contradictory things, well, what else could possibly happen?