My question is why Mossad, supposedly the best intelligence organization on the planet, didn’t have a clue that such a large scale attack was being planned and equipped for by Hamas.
Check this out ...
Low-tech communications was not looked for which is hard to believe when one knows that you are dealing with 6th century animals.
I believe it was in the Reagan administration that it was postulated “the muslim uses tech he cannot understand to destroy the beautiful things he cannot create.”
There are three possibilities.
1. They are not the best intelligence agency in the world.
2. Even if they are, intelligence is never perfect.
3. They knew about the attack, but allowed it to proceed.
The only one I think is dubious is number 3. The real answer is most likely #2.
Why didn't the US know about the Pearl Harbor attack? It was planned for almost a year in advance by the Japanese involving fleets of large ships, hundreds of aircraft and 10s of thousands of men. See #2 above.
” why Mossad, supposedly the best intelligence organization on the planet, didn’t have a clue ...”
On hindsight, wonder what clues would have been visible or detectable by Israeli intelligence.