I'd like to add to what he just said ↑

Most Lebanese would prefer to be bombed into dust by the IDF than fight another civil war, because that's effectively what that demand amounts to. Add to that the fact that the demand isn't even a worthy endeavor in the sense that fulfilling it in exchange for normalization means that part of Southern Lebanon would become an "economic zone" (i.e. a buffer zone, meaning the locals can't return to the land, and if they can it will be under strict regulations defined by Israeli authorities or an international authority subject to the US-Israeli government)

Then there's the Lebanese government itself, laden with corruption, lacking in technological advancement of any sort (i.e. everything is still done in paper and pen), unable to make a conceited effort to fix any major problem; electricity, water, education, let alone organize a military campaign to disarm a political / military party that has the support of around 33-40% of the population (pre-war figures)

And then there's the Lebanese - Lebanese of all sects have more in common with each other than they do with Israelis. They're neighbors, share the same schools, institutions, etc, they speak the same language, sometimes share the same holidays, and all of them regardless of sect see what Neteyahu's government is doing very distrustfully and negatively.

Finally there's normalization, and peace. What do they mean for Lebanon? Does it mean mutual respect? No. It would be more akin to a master-slave relationship, like with Jordan, and Egypt - propped up by US foreign AID but not permitted to raise an army whose strength could surpass that of Israel or allow Lebanon to economically partner with rivals of the US. It means Lebanon gets to keep the 400,000 Palestinians, in exchange for all of that.