Had Germany surrendered, conditionally, in July 1944 (as would have happened had Rommel replaced Hitler as Fuhrer had the July 20 putsch been successful), perhaps a million Jewish lives would have been saved. And arguably insistence of unconditional surrendered discouraged many Germans from supporting the various anti-Hitler conspiracies.
Note that had the United States stuck with the demand for unconditional surrender from Japan, American deaths in World War II would have been twice what they were, with the Russians ending up with all of Korea and much of Japan.
Particularly since most Arab states (though maybe not the people, only Lebanon anything the resembles routine free elections and it is ,more of resemblance than the real thing) regard Hamas as a pain in the tuchus,, Israel has room to negotiate something gets the surviving hostages (if any) back, disarms Hamas, and leads to Gaza being controlled by someone who won’t be sponsoring terrorism.