Trade embargoes are an act of war, and they strengthen the hand of hardliners within a given country. If you want to go to war, impose trade sanctions. Iran has shown astonishing self control in the face of the USA-backed murderous sanctions, especially when it is a country who leaders believe God will avenge them on USA. Perhaps He will. But regardless, trade embargoes necessarily make for distorted markets and a ripple effect of hard feelings, where not outright war.