Of course the Iranians have a motive, as do the Russians and Venezuelans and right now that's an axis of allies. All of them have less competitive infrastructure/heavy crude that requires oil prices to be reasonably high to make money off of it. $50 annoys them.
I would imagine they could find explosive remnants and fingerprint them. Saudi Arabia could be on the false flag motivation list, too. Maybe nobody will be blamed, but as the article states, anyway it goes down Iran winds up in the booby chair, so maybe half a false flag.
Brace yourself, the False Flag Claims are coming. And this time, they'll be from the Left.