Hamas takes hostages because they believe the Israeli's value them. That gives Hamas leverage by kidnapping Israelis.
Israel needs to devalue the lives of Hamas's hostages to deprive them of leverage. Think of the hostages as already dead, and proceed to turn Gaza into ash.
It's difficult for terrorists to hijack airliners, because once they reveal themselves, the other passengers presume that they are already dead (or will be dead), that they have nothing left to lose, and they overpower the hijackers.
War has to be cruel to discourage others from making war in the future.
Total war saves live because it shortens the conflict and decisively defeats the enemy to the point of unconditional surrender or complete annihilation.
I have no sympathy for aggressors and the parties that enable them. If you're dumb, arrogant, or conceited enough to think you can mess with a bull, you deserve the horns.
The United Nations exists so nations can work out their differences without war.
Putin started the war and continues the war because he does not want peace with Ukraine; he wants to conquer it.