It's not that poorly thought out if you look at it from the right perspective. Iran is the biggest enemy of Israel, and Iran has been significantly weakened. Israel was wiling to roll the dice on regime change in Iran as long as someone else was doing most of the fighting.

The U.S. was a power in decline before the Iran war, and the U.S. population was turning against Israel anyhow, so it made sense to get America to give it one last hurrah before they became useless to Israel.