Israeli society, already working on some 30+ (or 70+ depending on how you count it) years of dehumanization of Palestinians,

Yeah make that a hundred.

A large proportion of them would still be upset if it was a ‘permanent’ ceasefire,

The protesters are actually calling for a ceasefire and have been for a while so at least it's not as one-sided as you seem to think. No idea about the ratios though, so feel free to drop them if you've seen them.

As I said - there are more ways than negotiation to achieve this.

Yes, but none will actually work. How many hostages has Israel retrieved outside of negotiations? From a purely strategic point of view force is not working if your goal is to retrieve the hostages (which we know it's not). Israelis aren't upset because the IDF is attempting to retrieve the hostages using force; they're upset because force can't work without sacrificing a significant fraction of those hostages as both we and the Israeli public have learned in the past few months.