That doesn't mean this guy is necessarily dangerous, rather than a BS artist, just that too-literal translations from Persian or Arabic tend to sound flowery, circumlocutory or dependent on turns of phrase that make them sound silly rather than dangerous, at least to Western ears.
Claiming to be a lone operator, rather than a member of a hacker group strictly controlled by the state makes him sound more credible as a hacker, as do the details he provides on how the cracks were accomplished and what his goals were.
What it does mean is that the Iranian government and Iranian military don't have full control over all the people in the country with the skills or desire to hack major governmental security systems.
Much worse, for the U.S.is that Iran has a skilled and probably sizable population of people who are IT savvy, curious, a little obsessive, wanting badly to prove their own skills, intelligence or worth, and secretive about their activities.
We have them, too, of course. They play Spot the Fed at Black Hat and rake in lulz at 4Chan.
The Iranian contingent probably doesn't like being monitored or controlled by their government any more than our hackers like the same treatment from ours.
The difference is that Iranian hackers apparently don't like our government, either, and are willing to turn the same effort against it and against the Western-dominated portions of the Internet, that U.S. hackers turn against Visa,Bank of America, the Church of Scientology and Rebecca Black.
I hope theirs aren't as skilled as ours have gotten to be.