Though your above response wasn't directed towards me, and perhaps against my better judgement, I'm going to stick my neck out, take an amateur's stab at it and
speculate, just to keep the discussion going. Again, this is just a
spitball:
Knowing Israel has a top-shelf and very capable intelligence apparatus (Shin Bet and Mossad) I’d imagine they have close to 100% insight as to who the planners of Oct. 7th were. I wouldn't be shocked if US/UK intelligence and assets would help as well, as needed.
For retaliation and decapitating the Hamas leadership involved with the attack, over time they could quietly go after them in a beneath-the-radar sort of way. And then work down to those who participated. Similar to Israel’s Wrath of God operation dealing with the 1972 Munich Olympic terrorists, designed by Moshe Dayan and approved by Golda Meir.
That’d be a start, but doesn’t ensure Israeli security going forward. I would hope that Shin Bet has covert operatives within Gaza that blend in with its citizens, keeping an eye on any future terrorists attacks being planned against Israel. Which would then be quickly dealt with in a similar manner. US/UK intelligence would likely help by supplying information, as needed.
So…that’s my handwaving for the day.