I would really like to know where you found that number and that idea...

Gaza is depending on the source 4.5 to 5.8% less populous currently and >10% less populous than had been projected.

And no Hamas didn't declare final solution. They were actively surprised how long they could kill people, makes sense given that the distance to the nearest military base was less than 50km...

However the Israeli leadership, some of who call them untermensch¹, have shrunk their living space by more than 10% making the largest, current times, concentrationcamp² even worse than it was before.

[1] “We are fighting human animals and we are acting accordingly,” https://www.timesofisrael.com/liveblog_entry/defense-ministe...

[2] note that Hajo Meyer, a holocaust survivor, already called it this in 2005... https://www.sp.nl/nieuws/tribune-09-2006-interview-hajo-meye...