^ This is the one dimensional version that the Trump administration has been pushing.
1) Israel forced the hand of the US by vowing to go forward with its own attack regardless. Israel is basically a fourth branch of the US government (Executive, Legislative, Judicial, and Israel, except Israel should be listed before the rest.) Marco Rubio essentially said this.
2) Iran is a rogue state that is a top money maker within BRICS, hence it's a "hole" in the plans for a CBDC... a remaining state where business can be transacted without the possibility of being bound to digital currency rules. Basically destroying Iran supports the petrodollar and preserves US currency dominance.
3) Israel internally wants a Greater Israel. Mike Huckabee, Zionist shill and nut-case Christian dispensationalist who wants an "end times" war, explained this to Tucker in an interview.
I'm indifferent to Israel. I don't hate Israel and I certainly don't hate Jews. But we're totally fighting Israel's war.
The world is probably better off with a neutered Iran. But the US has an extremely bad track record of rebuilding Middle Eastern countries after toppling their governments. Iraq is finally doing OK but it's held together with duct tape. And look at Libya and Syria.
Iran is probably gonna wind up being yet another consumer of billions in US foreign aid when this is over.
I suspect that Iran won't self govern seamlessly. At best it will turn into a humanitarian nightmare and at worst an even worse government will take over.