He wants to fantasize about the thing. Some folks get off on such things. He imagines that dozens if not hundreds of sites can be hit almost simultaneously with accuracy and that no valuable sites will remain afterward, even those currently unknown or buried deep underground or within mountains.(He probably expects nuclear weapons to be used to destroy these, a cinch!). He also imagines that such an effort will mean Iran does not withdraw from the NPT and continue apace, (or else commence) its weaponization effort with added zeal and without any inspections regime whatsoever.
U.S. says working on initiative to de-escalate Syria fighting, with focus on Aleppo (Reuters)
from the article: Report: New Iran nuclear facility will be operational soon