Israel’s war on Iran was an important piece in the way to the collapse of the regime. It exposed how incompetent the regime truly is in protecting Iran, and how the Iranian “ring of fire” project (masterminded by Qassem Suleimani) to encircle Israel with proxies, at a cost of tens of billions of dollars, was taken apart by Israel in the course of a year. All of this investment, in direct funding as well as sanctions over the past 40 years came to naught when Israel struck back. Mullahs were exposed as weak, irrelevant, only able to oppress their own.
Furthermore, Israel essentially decapitated the Iranian state apparatus in those 12 days. Everyone who mattered in the government and IRGC was killed. It just completely pulled the rug from under this regime.
I’m almost confident this is over. And with it there’s going to be a huge shift in Middle East politics. Likely more countries will align with Israel, but the removal of the primary Shia power might push the Sunnis to negatively fixate on Israel.