Tangentially related: why do so many people call for a ceasefire, when a ceasefire is generally temporary. It wouldn't resolve any of the underlying reasons for the war. He should be calling for surrender.
Who should surrender, though? At this point in time, if Hamas were to surrender, the Israeli occupation of Gaza would just get worse. That wouldn't be peace, or justice, for people of Gaza. I certainly don't support what Hamas has done, but Israeli rule will probably be pretty brutal for Palestinians.