Another editorial posted here noted the internal strife the Iranian government is dealing with. Evidently the locals are growing increasingly restless and unhappy and are showing it. One way to tighten things up at home is to face a foreign enemy, in this case the Anglo-American coalition.
True, but pulling on the tigers tail is not a way to ensure your long term survival.
However, they seem to have calculated correctly that our response would be only verbal, and are sitting back now and laughing their asses off at our impotence.