The argument that the war between Iran and Israel comes down to the fate of Fordow is lazy and even misleading. Let’s assume for a moment that US President Donald Trump decides to send US aerial assets to take out the nuclear site that is buried beneath the ground, then what? What does the United States do after that? And how does Iran respond?
Given Trump’s deep apprehension about any kind of open-ended involvement in the Middle East (for all the right reasons), he will most likely call it a day, send the bombers back home, and declare victory. But would that really solve the problem? I doubt it.
If attacked, Iran has vowed to retaliate against US forces and personnel in the region, which would be a lot easier for it to do given the close geographical proximity of US bases in the Gulf (a big reason why Iran has been less effective in its strikes against Israel is distance, in addition to its lack of a modern air force).
If the Iranians start shooting, which they most definitely will, then the United States will be forced to respond with devastating force and probably go for the kill by decapitating the leadership in Tehran, and as Trump himself threatened lately, by killing Supreme Leader Ali Khamenei.
In such a shootout, American casualties will be inevitable (though probably reduced because US Central Command has been on high alert and Trump ordered the evacuation of a large number of US personnel from the region), but nothing compared to what Iran will suffer.
