I don't think that the US is realistically going to let Israel ever get eradicated by its neighbors, so I propose the funniest realistic future of the Gaza being glassed into near uninhabitability.
The levels of seething from annoying progressives at the "downtrodden opressed group of literal sand niggers rising up against their meanie opressors" being turned into dust literally and metaphorically would be quite entertaining.
Israel itself won't allow it to be eradicated either, at least not without turning every one of their neighbors into radioactive shitholes. After Israel obtained their own nukes they had Operation Samson prepared in the event that Jerusalem appears to be lost.
26 And Samson said unto the lad that held him by the hand, Suffer me that I may feel the pillars whereupon the house standeth, that I may lean upon them.
27 Now the house was full of men and women; and all the lords of the Philistines were there; and there were upon the roof about three thousand men and women, that beheld while Samson made sport.
28 And Samson called unto the Lord, and said, O Lord God, remember me, I pray thee, and strengthen me, I pray thee, only this once, O God, that I may be at once avenged of the Philistines for my two eyes.
29 And Samson took hold of the two middle pillars upon which the house stood, and on which it was borne up, of the one with his right hand, and of the other with his left.
30 And Samson said, Let me die with the Philistines. And he bowed himself with all his might; and the house fell upon the lords, and upon all the people that were therein. So the dead which he slew at his death were more than they which he slew in his life.
Israel it's self admits they had no idea this attack was happening. Assuming they are telling the truth and didn't straight up 9/11 it. Then that leaves 2 realistic possabilities.
1. Hamas planned this entirely on their own entirely within their own network. This would leave very limited chance of opsec breakdown since it is muslims telling other loyal muslims face to face.
2. It is so well planned that it involved discussion with other anti-Israel faction such as Lebanon, Egypt, Iran, and Iraq. If this is the case it means their opsec has simply been upgraded with encrypted comms and things are going to only get messier.
I tend to lean towards the first option, I'd say they told guys in Hezbollah and handlers in Iran and others that something was going to happen but gave little to no specifics because once word spreads too much it makes it much easier for Israel to figure out what's happening. Something this big would need to be super tight lipped, like the guys using the hang gliders; the training was kept lowkey and of course hitting Israeli defenses when they were poorly manned during the holidays. Though it does awe me quite a lot that the Jews would still let their guard down during holidays after Yom-Kippur.