Well 1300 Israeli dead by say 50? That would be 65000 give or take. They will need to do this over a long period of time unless they just get it over with. Historically they would have killed 100 percent, the City of Ai in Joshua for example was 12000 men and women but they kept the cows and loot.
Israelis if they want to vanquish Hamas needs to be smarter. They cannot rely on tanks alone as the Russia-Ukraine war has already shown. Also, getting into tunnels will subject them to bobbie traps and ambushes. What they should do is use the small inexpensive drones that you fly to take panoramic pictures with and attach huge chunks of plastic explosives to it. Then, fly it into the tunnels in huge numbers. Those drones has cameras to take pictures of who is inside the tunnels and in what part. Hamas would have no place to hide and if they shoot those drones, it will explode and kill them just the same. Ignore it and those drones can be detonated when around groups of Hamas fighters as well. That is the way to get Hamas. These tunnels are estimated to cover 400 square miles so, one more reason to use drones because they can cover a huge area in a short period of time. Drones with huge explosive charges can also, destroy those tunnels very effectively.
The Israelis have already shown off and demonstrated the technology they plan to use to tackle the Gaza tunnels. It includes everything from small surveillance drones and explosive drones to quick hardening foam to seal off tunnels. TheMickey posted an article which covers some of this including sponge bombs in the other thread.