This is 9/11 redeux.
The perpetrators want the Iranians to claim credit, like they want ISIS to claim credit when someone in Europe drops a dish scaring those around. (A Chinese chef dropped a large pot of rice terrifying the guests and ISIS claims credit for the incident, more news at 11)
Iran is not stupid enough to start a conflict. They have the UN JCPOA, an Iranian started conflict will end up like Saddam with
UN sanctions and worse.
It is far more sane to build 400 nukes, as the Iranian officials are well aware.
Attacking Japanese shipping while asking the Japanese for help is lower than retarded.