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...
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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...