Also, I wondered if anyone paraglides over the US borders where another hi-tech fence is under construction. I couldn't find any, but found that it had happened in 2022 between Morocco and Spain's North African enclave of Melilla https://www.reuters.com/world/europe/migrant-paraglides-over...
On the other, Israel is an acknowledged world leader in electronic warfare and jamming etc, so they have a very deep understanding of the technical vulnerabilities of wireless comms.
The border fence project did a lot of digging up of the ground so it surprises me if everything wasn't wired together with a mesh and lots of redundancy. And also that cutting the wire would itself trigger alerts and things.
So the part of the story where Hamas blinded everything by targeting cell towers doesn't seem likely. I wouldn't imagine Israel to be vulnerable like that. The bigger picture where Israel was caught off guard resource-wise and response-wise is very plausible though.