I think israel had many good reasons to suspect something was coming aside from the anni - apparently also multiple warnings from egypt - and either didn't prep to the threat, or (as it seems with the deployment of forces) pulled soldiers off the wall and borders in multiple places.

doesn't make hamas less bad, they're def war criminals, but this is just... uncharacteristic for the Shin Bet/Mossad/MOI. No intelligence org is perfect, but damn.... this is gonna require study.