They can’t stop the war, because Iran will not allow it. The Palestinians of Gaza and Lebanon lost all their power when each elected an Iranian terrorist proxy to govern them. No agreement now between Palestinians and Israel will be honored by Iran, who will continue to rearm and resupply it’s proxies just as they are doing know. Those proxies have a mandate to destroy Israel completely and the religious fanatic mullahs of Iran will settle for nothing less. You see the people of Gaza and Lebanon cannot make their laws, agreements or anything for that matter without the approval of their proxies. This is a terrible situation to be in, I agree, but it is the people who did this to themselves, they are caught in a trap of their own making.