You know what I'm basing it on because I've posted this multiple times in the thread. Perhaps you just ignore inconvenient information.
That was part of their intelligence that had indication a year before, but they had even more specific knowledge just WEEKS before the attack as well, amongst other warnings...
A Never-before-seen IDF Document Surfaces Startling New Details of Hamas' Operational Plans to Invade Israel; The Report Outlines Hamas Orders to Take Between 200-250 Israelis Hostage
www.haaretz.com
Just chalk it up for incompetence, huh? They manage to take out Hezbollah with fucking pagers but take an enormous hit by guys in Adidas sweatpants and flip-flops. In a small region where on every street corner their are soldiers with guns they take HOURS to show up to the scene that they knew was going to be attacked. Go figure...