My guess is that Israel needs to obliterate Fordow not because Iran is building a A-bomb there, but because if the facility is reduced to a pile of smoking, radioactive wreckage, then no one can examine the site (Iran, IAEA, US, whoever) to dispute their claims.
That would be a desperate gamble but I think they're there.
I would add this to the whole thesis about Israel nuking Fordow, which just happened but I found it after I posted:
Israel wants to annihilate Iranian nuclear facilities before talks – ambassador: Any consideration of peace talks must come after Iran loses the capability to pursue the program, Simona Halperin has told RT (RT 6/16/2025)
My guess is that Israel needs to obliterate Fordow not because Iran is building a A-bomb there, but because if the facility is reduced to a pile of smoking, radioactive wreckage, then no one can examine the site (Iran, IAEA, US, whoever) to dispute their claims.
That would be a desperate gamble but I think they're there.