US didn't inform Iran BEFORE, you misunderstood, US let Iran know after the strikes that these were the only strikes targeting nuclear facilities and US wouldn't conduct any more strikes.
Israel wouldn't launch an attack if they didn't stockpile enough interceptors and be confident in their ability to degrade Iran's ballistic missiles, they been planning for this for more than a decade.
Israel hit the major missile base by Tabriz, which caused massive secondary explosions, what are you even talking about?
https://apnews.com/photo-gallery/iran-israel-missile-bases-satellite-photos-c2ca6d9d80567403cdb46653ffb17eb0
huh? Israel was literally bombing Iranian stockpiles and manufacturing sites in the first day
and even the scientific centers of research responsible for development of these missiles