It's pretty likely they thought they had someone in the bag before they attacked.

Remember the riots in Iran in January? Western media reported the crowds were chanting for "Prince Reza". Mossad was publicly bragging they had agents in country, agitating those riots. It was the Mossad agents that were pushing "Price Reza". No-one in Iran, over the age of 50, would want any part of the Pahlavi tribe, and they would tell the younger people why they didn't want that bunch back in power.

So, now, they try to insist they did have a plan. But they pick Ahmadinejad, who is Kaddafi lite? They probably picked him, after the fact, because kn-one knows where he is, so he can't deny it. Mossad agents probably found, and greased, him, so he will never be able to deny it.

And that person either was inadvertently killed in the initial strikes

von Stauffenberg knew to get out of the room, after he started the fuses. No way would a picked front man sit in a meeting he knew was targeted. One of the Mossad or CIA agents in country would make sure he was safe.

I agree Israel would love Iran to be a failed state, because then Iran could not obstruct Israeli expansion. But that isn't necessarily Trump's objective. Closing the Strait takes more oil off the market, than only tipping Iran into chaos.

Steve