Irans air force is in shambles. They were using very very old Amercian fighters, which the Americans stopped manufacturing spare parts for because they ended up in Iran. On the other hand, Israel has the best of the best from the US. Since other nations separate the two, Iran can only respond with missle or air attacks.So they don't have much
Will it be a cluster? Absolutely. Although nobody wants Iran to have nuclear capability, no one is willing to get their hands dirty.