A war between Iran and Israel is higher for no other reason than Iran’s stated goal of annihilating Israel is closer to becoming reality.
Israel may have support from Saudi Arabia—they do not want a nuclear Persia—they reject their brand if Islam.
I suspect the Israeis will go total scorched-earth on Iran. Detonate an EMP over the country to fry their infrastructure. Blow up all major dams. Take out as much of the road and electric grid as possible. Make the ayatollahs spend the next decade worrying more about how to feed their people than how to build a bomb.