Trusted or not, they will side with us. Either that or sit on the sidelines. Iraq will be the most powerful arab country within 5 years. And they will be an ally. And Turkey is in NATO, so they will nominally be on our side. Saudis and Jordan will sit it out. Egypt will sit it out. That leaves Syria, Iran, Algeria, and maybe a handful of others if they really want to start a war. Their odds of success are zero.