The Palestianian Hamas organization is crowded into the Gaza Strip and parts of the West bank.
It is quite possible for them to carry out planning by word of mouth and runners to avoid electronic means of detection and eavesdropping by Israeli intelligence.
No one is perfect and obviously this was a huge failure of intelligence on their part (and our own intelligence agencies for that matter. Having worked in several of them I know what bozos some of them can be!).
I suggest waiting for the dust to settle a little before pointing fingers and assigning blame or conspiracies.
The objective for them now is to crush the Palestinians.
Don’t stop to navel gaze; just do it.
Seems the Isralies stopped the tunnel traffic.
Now, the Pali are using paragliders and motor bikes
Now, the Palis are using the Iran suicide drones to knock out Merkav tanks and large vehicles
Difficult times in the coming weeks and months
So true regarding agents, As I often tenll my wife just because someone has a title doesn’t mean they are competent