iran- Iran’s missile launches: A sign of strength or weakness?

The war of affairs in the world has never been a sign of power, and one who is not capable of answering matters is violent so as to cover his weaknesses and disabilities. So dictators are all aggressive and because they do not regulate their people with justice, they want to pursue their goals and rule them, but they can not and eventually lose everything because they do not have the support of their people.
How should we evaluate Iran’s medium-range missile strikes, boasted by the mullahs as an official response to the June 7th twin attacks allegedly staged by ISIS in Tehran? As a sign of strength showing Iran’s ability to take on ISIS while also sending a message to all adversaries, most importantly Washington? Or a desperate attempt by the mullahs to maintain a straight face against increasing domestic and foreign crises?
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