Iran is a lot like China in that they will orchestrate attacks, but always do it through proxy. They never want any responsibility to come home to them. Hamas and Hezbollah I can see doing dumb things. Iran is a little more calculating, however, and that is what gives me pause before completely dismissing their incoherent ramblings.
This is a win win situation for Iran.
1 No body is talking about their nuclear program
2 Arabs are being killed