I think it's pretty clear that this war was initiated by Israel, who asked/hoped that the US would go along with it.

While I can easily imagine the Trump crew is a bit impulsive and unprepared, I am VERY sure Israel went in to this with their usual competency, including very clear plans and targets.

If this eventually results in a half decent Iranian government, that would be the best thing that happened to the world this century! A period of war and high oil prices is a cheap price to pay, IF that actually happens.