It's Iran that's been "sowing war",every since the Iran deal the boost that the deal gave to their economy has been used to build up the revolutionary guard and wage proxy wars all over the middle east. They have attacked Saudi oil fields, tankers in the Hormuz strait, waged war in Jemen, built up Iran loyal forces all over the place that commits terror attacks on anybody that the mullas deem to be an enemy.
The sanctions on Iran was a first warning, the Iranians ignored the message. Taking out the brain behind all the proxy wars was the next warning. I think they got it this time.
You shouldn't let their rhetoric fool you, That's how losers save face in the middle east.
Remember when that Iranian won the Nobel peace prize? They threatened them with death and torture. (I don't remember the exact wording).